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Tables

Documentation and examples for opt-in styling of tables (given their prevalent use in JavaScript plugins) with Bootstrap.

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Overview

Due to the widespread use of <table> elements across third-party widgets like calendars and date pickers, Bootstrap’s tables are opt-in. Add the base class .table to any <table>, then extend with our optional modifier classes or custom styles. All table styles are not inherited in Bootstrap, meaning any nested tables can be styled independent from the parent.

Using the most basic table markup, here’s how .table-based tables look in Bootstrap.

#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry the Bird		@twitter

<table class="table">
  <thead>
    <tr>
      <th scope="col">#</th>
      <th scope="col">First</th>
      <th scope="col">Last</th>
      <th scope="col">Handle</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <th scope="row">1</th>
      <td>Mark</td>
      <td>Otto</td>
      <td>@mdo</td>
    </tr>
    <tr>
      <th scope="row">2</th>
      <td>Jacob</td>
      <td>Thornton</td>
      <td>@fat</td>
    </tr>
    <tr>
      <th scope="row">3</th>
      <td colspan="2">Larry the Bird</td>
      <td>@twitter</td>
    </tr>
  </tbody>
</table>

Variants

Use contextual classes to color tables, table rows or individual cells.

Heads up! Because of the more complicated CSS used to generate our table variants, they most likely won’t see color mode adaptive styling until v6.

Class	Heading	Heading
Default	Cell	Cell
Primary	Cell	Cell
Secondary	Cell	Cell
Success	Cell	Cell
Danger	Cell	Cell
Warning	Cell	Cell
Info	Cell	Cell
Light	Cell	Cell
Dark	Cell	Cell

<!-- On tables -->
<table class="table-primary">...</table>
<table class="table-secondary">...</table>
<table class="table-success">...</table>
<table class="table-danger">...</table>
<table class="table-warning">...</table>
<table class="table-info">...</table>
<table class="table-light">...</table>
<table class="table-dark">...</table>

<!-- On rows -->
<tr class="table-primary">...</tr>
<tr class="table-secondary">...</tr>
<tr class="table-success">...</tr>
<tr class="table-danger">...</tr>
<tr class="table-warning">...</tr>
<tr class="table-info">...</tr>
<tr class="table-light">...</tr>
<tr class="table-dark">...</tr>

<!-- On cells (`td` or `th`) -->
<tr>
  <td class="table-primary">...</td>
  <td class="table-secondary">...</td>
  <td class="table-success">...</td>
  <td class="table-danger">...</td>
  <td class="table-warning">...</td>
  <td class="table-info">...</td>
  <td class="table-light">...</td>
  <td class="table-dark">...</td>
</tr>

Accessibility tip: Using color to add meaning only provides a visual indication, which will not be conveyed to users of assistive technologies like screen readers. Please ensure the meaning is obvious from the content itself (e.g., the visible text with a sufficient color contrast) or is included through alternative means, such as additional text hidden with the .visually-hidden class.

Accented tables

Striped rows

Use .table-striped to add zebra-striping to any table row within the <tbody>.

#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry the Bird		@twitter

<table class="table table-striped">
  ...
</table>

Striped columns

Use .table-striped-columns to add zebra-striping to any table column.

#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry the Bird		@twitter

<table class="table table-striped-columns">
  ...
</table>

These classes can also be added to table variants:

#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry the Bird		@twitter

<table class="table table-dark table-striped">
  ...
</table>

#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry the Bird		@twitter

<table class="table table-dark table-striped-columns">
  ...
</table>

#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry the Bird		@twitter

<table class="table table-success table-striped">
  ...
</table>

#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry the Bird		@twitter

<table class="table table-success table-striped-columns">
  ...
</table>

Hoverable rows

Add .table-hover to enable a hover state on table rows within a <tbody>.

#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry the Bird		@twitter

<table class="table table-hover">
  ...
</table>

#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry the Bird		@twitter

<table class="table table-dark table-hover">
  ...
</table>

These hoverable rows can also be combined with the striped rows variant:

#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry the Bird		@twitter

<table class="table table-striped table-hover">
  ...
</table>

Active tables

Highlight a table row or cell by adding a .table-active class.

#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry the Bird		@twitter

<table class="table">
  <thead>
    ...
  </thead>
  <tbody>
    <tr class="table-active">
      ...
    </tr>
    <tr>
      ...
    </tr>
    <tr>
      <th scope="row">3</th>
      <td colspan="2" class="table-active">Larry the Bird</td>
      <td>@twitter</td>
    </tr>
  </tbody>
</table>

#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry the Bird		@twitter

<table class="table table-dark">
  <thead>
    ...
  </thead>
  <tbody>
    <tr class="table-active">
      ...
    </tr>
    <tr>
      ...
    </tr>
    <tr>
      <th scope="row">3</th>
      <td colspan="2" class="table-active">Larry the Bird</td>
      <td>@twitter</td>
    </tr>
  </tbody>
</table>

How do the variants and accented tables work?

For the accented tables (striped rows, striped columns, hoverable rows, and active tables), we used some techniques to make these effects work for all our table variants:

We start by setting the background of a table cell with the --bs-table-bg custom property. All table variants then set that custom property to colorize the table cells. This way, we don’t get into trouble if semi-transparent colors are used as table backgrounds.
Then we add an inset box shadow on the table cells with box-shadow: inset 0 0 0 9999px var(--bs-table-bg-state, var(--bs-table-bg-type, var(--bs-table-accent-bg))); to layer on top of any specified background-color. It uses custom cascade to override the box-shadow, regardless the CSS specificity. Because we use a huge spread and no blur, the color will be monotone. Since --bs-table-accent-bg is set to transparent by default, we don’t have a default box shadow.
When either .table-striped, .table-striped-columns, .table-hover or .table-active classes are added, either --bs-table-bg-type or --bs-table-bg-state (by default set to initial) are set to a semitransparent color (--bs-table-striped-bg, --bs-table-active-bg or --bs-table-hover-bg) to colorize the background and override default --bs-table-accent-bg.
For each table variant, we generate a --bs-table-accent-bg color with the highest contrast depending on that color. For example, the accent color for .table-primary is darker while .table-dark has a lighter accent color.
Text and border colors are generated the same way, and their colors are inherited by default.

Behind the scenes it looks like this:

node_modules/bootstrap/scss/mixins/_table-variants.scss

@mixin table-variant($state, $background) {
  .table-#{$state} {
    $color: color-contrast(opaque($body-bg, $background));
    $hover-bg: mix($color, $background, percentage($table-hover-bg-factor));
    $striped-bg: mix($color, $background, percentage($table-striped-bg-factor));
    $active-bg: mix($color, $background, percentage($table-active-bg-factor));
    $table-border-color: mix($color, $background, percentage($table-border-factor));

    --#{$prefix}table-color: #{$color};
    --#{$prefix}table-bg: #{$background};
    --#{$prefix}table-border-color: #{$table-border-color};
    --#{$prefix}table-striped-bg: #{$striped-bg};
    --#{$prefix}table-striped-color: #{color-contrast($striped-bg)};
    --#{$prefix}table-active-bg: #{$active-bg};
    --#{$prefix}table-active-color: #{color-contrast($active-bg)};
    --#{$prefix}table-hover-bg: #{$hover-bg};
    --#{$prefix}table-hover-color: #{color-contrast($hover-bg)};

    color: var(--#{$prefix}table-color);
    border-color: var(--#{$prefix}table-border-color);
  }
}

Table borders

Bordered tables

Add .table-bordered for borders on all sides of the table and cells.

#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry the Bird		@twitter

<table class="table table-bordered">
  ...
</table>

Border color utilities can be added to change colors:

#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry the Bird		@twitter

<table class="table table-bordered border-primary">
  ...
</table>

Tables without borders

Add .table-borderless for a table without borders.

#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry the Bird		@twitter

<table class="table table-borderless">
  ...
</table>

#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry the Bird		@twitter

<table class="table table-dark table-borderless">
  ...
</table>

Small tables

Add .table-sm to make any .table more compact by cutting all cell padding in half.

#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry the Bird		@twitter

<table class="table table-sm">
  ...
</table>

#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry the Bird		@twitter

<table class="table table-dark table-sm">
  ...
</table>

Table group dividers

Add a thicker border, darker between table groups—<thead>, <tbody>, and <tfoot>—with .table-group-divider. Customize the color by changing the border-top-color (which we don’t currently provide a utility class for at this time).

#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry the Bird		@twitter

html

<table class="table">
  <thead>
    <tr>
      <th scope="col">#</th>
      <th scope="col">First</th>
      <th scope="col">Last</th>
      <th scope="col">Handle</th>
    </tr>
  </thead>
  <tbody class="table-group-divider">
    <tr>
      <th scope="row">1</th>
      <td>Mark</td>
      <td>Otto</td>
      <td>@mdo</td>
    </tr>
    <tr>
      <th scope="row">2</th>
      <td>Jacob</td>
      <td>Thornton</td>
      <td>@fat</td>
    </tr>
    <tr>
      <th scope="row">3</th>
      <td colspan="2">Larry the Bird</td>
      <td>@twitter</td>
    </tr>
  </tbody>
</table>

Vertical alignment

Table cells of <thead> are always vertical aligned to the bottom. Table cells in <tbody> inherit their alignment from <table> and are aligned to the top by default. Use the vertical align classes to re-align where needed.

Heading 1	Heading 2	Heading 3	Heading 4
This cell inherits `vertical-align: middle;` from the table	This cell inherits `vertical-align: middle;` from the table	This cell inherits `vertical-align: middle;` from the table	This here is some placeholder text, intended to take up quite a bit of vertical space, to demonstrate how the vertical alignment works in the preceding cells.
This cell inherits `vertical-align: bottom;` from the table row	This cell inherits `vertical-align: bottom;` from the table row	This cell inherits `vertical-align: bottom;` from the table row	This here is some placeholder text, intended to take up quite a bit of vertical space, to demonstrate how the vertical alignment works in the preceding cells.
This cell inherits `vertical-align: middle;` from the table	This cell inherits `vertical-align: middle;` from the table	This cell is aligned to the top.	This here is some placeholder text, intended to take up quite a bit of vertical space, to demonstrate how the vertical alignment works in the preceding cells.

<div class="table-responsive">
  <table class="table align-middle">
    <thead>
      <tr>
        ...
      </tr>
    </thead>
    <tbody>
      <tr>
        ...
      </tr>
      <tr class="align-bottom">
        ...
      </tr>
      <tr>
        <td>...</td>
        <td>...</td>
        <td class="align-top">This cell is aligned to the top.</td>
        <td>...</td>
      </tr>
    </tbody>
  </table>
</div>

Nesting

Border styles, active styles, and table variants are not inherited by nested tables.

First

Last

Handle

Mark

Otto

@mdo

Header	Header	Header
A	First	Last
B	First	Last
C	First	Last

Larry

the Bird

@twitter

<table class="table table-striped table-bordered">
  <thead>
    ...
  </thead>
  <tbody>
    ...
    <tr>
      <td colspan="4">
        <table class="table mb-0">
          ...
        </table>
      </td>
    </tr>
    ...
  </tbody>
</table>

How nesting works

To prevent any styles from leaking to nested tables, we use the child combinator (>) selector in our CSS. Since we need to target all the tds and ths in the thead, tbody, and tfoot, our selector would look pretty long without it. As such, we use the rather odd looking .table > :not(caption) > * > * selector to target all tds and ths of the .table, but none of any potential nested tables.

Note that if you add <tr>s as direct children of a table, those <tr> will be wrapped in a <tbody> by default, thus making our selectors work as intended.

Anatomy

Table head

Similar to tables and dark tables, use the modifier classes .table-light or .table-dark to make <thead>s appear light or dark gray.

#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry	the Bird	@twitter

<table class="table">
  <thead class="table-light">
    ...
  </thead>
  <tbody>
    ...
  </tbody>
</table>

#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry	the Bird	@twitter

<table class="table">
  <thead class="table-dark">
    ...
  </thead>
  <tbody>
    ...
  </tbody>
</table>

Table foot

#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry	the Bird	@twitter
Footer	Footer	Footer	Footer

<table class="table">
  <thead>
    ...
  </thead>
  <tbody>
    ...
  </tbody>
  <tfoot>
    ...
  </tfoot>
</table>

Captions

A <caption> functions like a heading for a table. It helps users with screen readers to find a table and understand what it’s about and decide if they want to read it.

List of users
#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry the Bird		@twitter

<table class="table table-sm">
  <caption>List of users</caption>
  <thead>
    ...
  </thead>
  <tbody>
    ...
  </tbody>
</table>

You can also put the <caption> on the top of the table with .caption-top.

List of users
#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry	the Bird	@twitter

html

<table class="table caption-top">
  <caption>List of users</caption>
  <thead>
    <tr>
      <th scope="col">#</th>
      <th scope="col">First</th>
      <th scope="col">Last</th>
      <th scope="col">Handle</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <th scope="row">1</th>
      <td>Mark</td>
      <td>Otto</td>
      <td>@mdo</td>
    </tr>
    <tr>
      <th scope="row">2</th>
      <td>Jacob</td>
      <td>Thornton</td>
      <td>@fat</td>
    </tr>
    <tr>
      <th scope="row">3</th>
      <td>Larry</td>
      <td>the Bird</td>
      <td>@twitter</td>
    </tr>
  </tbody>
</table>

Responsive tables

Responsive tables allow tables to be scrolled horizontally with ease. Make any table responsive across all viewports by wrapping a .table with .table-responsive. Or, pick a maximum breakpoint with which to have a responsive table up to by using .table-responsive{-sm|-md|-lg|-xl|-xxl}.

Vertical clipping/truncation

Responsive tables make use of overflow-y: hidden, which clips off any content that goes beyond the bottom or top edges of the table. In particular, this can clip off dropdown menus and other third-party widgets.

Always responsive

Across every breakpoint, use .table-responsive for horizontally scrolling tables.

#	Heading	Heading	Heading	Heading	Heading	Heading	Heading	Heading	Heading
1	Cell	Cell	Cell	Cell	Cell	Cell	Cell	Cell	Cell
2	Cell	Cell	Cell	Cell	Cell	Cell	Cell	Cell	Cell
3	Cell	Cell	Cell	Cell	Cell	Cell	Cell	Cell	Cell

<div class="table-responsive">
  <table class="table">
    ...
  </table>
</div>

Breakpoint specific

Use .table-responsive{-sm|-md|-lg|-xl|-xxl} as needed to create responsive tables up to a particular breakpoint. From that breakpoint and up, the table will behave normally and not scroll horizontally.

These tables may appear broken until their responsive styles apply at specific viewport widths.

#	Heading	Heading	Heading	Heading	Heading	Heading	Heading	Heading
1	Cell	Cell	Cell	Cell	Cell	Cell	Cell	Cell
2	Cell	Cell	Cell	Cell	Cell	Cell	Cell	Cell
3	Cell	Cell	Cell	Cell	Cell	Cell	Cell	Cell

#	Heading	Heading	Heading	Heading	Heading	Heading	Heading	Heading
1	Cell	Cell	Cell	Cell	Cell	Cell	Cell	Cell
2	Cell	Cell	Cell	Cell	Cell	Cell	Cell	Cell
3	Cell	Cell	Cell	Cell	Cell	Cell	Cell	Cell

#	Heading	Heading	Heading	Heading	Heading	Heading	Heading	Heading
1	Cell	Cell	Cell	Cell	Cell	Cell	Cell	Cell
2	Cell	Cell	Cell	Cell	Cell	Cell	Cell	Cell
3	Cell	Cell	Cell	Cell	Cell	Cell	Cell	Cell

#	Heading	Heading	Heading	Heading	Heading	Heading	Heading	Heading
1	Cell	Cell	Cell	Cell	Cell	Cell	Cell	Cell
2	Cell	Cell	Cell	Cell	Cell	Cell	Cell	Cell
3	Cell	Cell	Cell	Cell	Cell	Cell	Cell	Cell

#	Heading	Heading	Heading	Heading	Heading	Heading	Heading	Heading
1	Cell	Cell	Cell	Cell	Cell	Cell	Cell	Cell
2	Cell	Cell	Cell	Cell	Cell	Cell	Cell	Cell
3	Cell	Cell	Cell	Cell	Cell	Cell	Cell	Cell

#	Heading	Heading	Heading	Heading	Heading	Heading	Heading	Heading
1	Cell	Cell	Cell	Cell	Cell	Cell	Cell	Cell
2	Cell	Cell	Cell	Cell	Cell	Cell	Cell	Cell
3	Cell	Cell	Cell	Cell	Cell	Cell	Cell	Cell

<div class="table-responsive">
  <table class="table">
    ...
  </table>
</div>

<div class="table-responsive-sm">
  <table class="table">
    ...
  </table>
</div>

<div class="table-responsive-md">
  <table class="table">
    ...
  </table>
</div>

<div class="table-responsive-lg">
  <table class="table">
    ...
  </table>
</div>

<div class="table-responsive-xl">
  <table class="table">
    ...
  </table>
</div>

<div class="table-responsive-xxl">
  <table class="table">
    ...
  </table>
</div>

Table sorting

OpenFrontend.Framework provides a table sorting feature that can be easily activated using the data-of-table-sort attribute. To utilize this feature, add the data-of-table-sort attribute to your <table> tag, as shown below:

#	First	Last	Handle
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry	Bird	@twitter

<table class="table" data-of-table-sort>
  <thead>
  <tr>
    <th scope="col">#</th>
    <th scope="col">First</th>
    <th scope="col">Last</th>
    <th scope="col">Handle</th>
  </tr>
  </thead>
  <tbody>
  <tr>
    <th scope="row">1</th>
    <td>Mark</td>
    <td>Otto</td>
    <td>@mdo</td>
  </tr>
  <tr>
    <th scope="row">2</th>
    <td>Jacob</td>
    <td>Thornton</td>
    <td>@fat</td>
  </tr>
  <tr>
    <th scope="row">3</th>
    <td>Larry</td>
    <td>Bird</td>
    <td>@twitter</td>
  </tr>
  </tbody>
</table>

When the data-of-table-sort attribute is present, the table will automatically be equipped with sorting functionality. The user can click on a column header to sort the table by the data in that column. Clicking again will reverse the sort order.

Extra options

You can pass extra options as JSON value of the data attribute.

Name	Born
John Doe	1992
Kevin Jones	1987
Donna Evans	2001

<table class="table" data-of-table-sort='{"index": 1, "direction": "desc"}'>
  <thead>
  <tr>
    <th scope="col">Name</th>
    <th scope="col">Born</th>
  </tr>
  </thead>
  <tbody>
  <tr>
    <td>John Doe</td>
    <td>1992</td>
  </tr>
  <tr>
    <td>Kevin Jones</td>
    <td>1987</td>
  </tr>
  <tr>
    <td>Donna Evans</td>
    <td>2001</td>
  </tr>
  </tbody>
</table>

Here is the list of all available options (alphabetically):

Option	Type	Default	Explanation
`direction`	`String`	`'asc'`	Initial sorting direction. Available options are: `asc`, `desc`.
`index`	`Number`	`undefined`	Initial sorting column’s index. Starting from `0`.

Sort by hidden values

Sometimes text inside cells is not normalized. Using the data-of-table-sort-value attribute, you can use optional data to sort on.

Date	Event
19th April, 1971	First space station.
12th April 1981	First reusable crewed orbital spacecraft.
24th September, 1970	First automatic sample return from the Moon.
3rd November, 1973	First mission sent to study Mercury.

<table class="table" data-of-table-sort='{"index": 0}'>
  <thead>
  <tr>
    <th scope="col">Date</th>
    <th scope="col">Event</th>
  </tr>
  </thead>
  <tbody>
  <tr>
    <td data-of-table-sort-value="40867200">19th April, 1971</td>
    <td>First space station.</td>
  </tr>
  <tr>
    <td data-of-table-sort-value="355881600">12th April 1981</td>
    <td>First reusable crewed orbital spacecraft.</td>
  </tr>
  <tr>
    <td data-of-table-sort-value="22982400">24th September, 1970</td>
    <td>First automatic sample return from the Moon.</td>
  </tr>
  <tr>
    <td data-of-table-sort-value="121132800">3rd November, 1973</td>
    <td>First mission sent to study Mercury.</td>
  </tr>
  </tbody>
</table>

CSS

src/scss/_table.scss

--#{$prefix}table-sort-padding-x: #{$table-sort-padding-x};
--#{$prefix}table-sort-bg-position: #{$table-sort-bg-position};
--#{$prefix}table-sort-bg-size: #{$table-sort-bg-size};

--#{$prefix}table-sort-indicator-color: #{$table-sort-indicator-color};
--#{$prefix}table-sort-indicator-color-active: #{$table-sort-indicator-color-active};

--#{$prefix}table-sort-indicator-default: #{escape-svg($table-sort-indicator-default)};
--#{$prefix}table-sort-indicator-asc: #{escape-svg($table-sort-indicator-asc)};
--#{$prefix}table-sort-indicator-desc: #{escape-svg($table-sort-indicator-desc)};

Sass variables

src/scss/_variables.scss

$table-sort-padding-x:                  .25rem;
$table-sort-bg-position:                right $table-sort-padding-x center;
$table-sort-bg-size:                    10px 18px; // In pixels because image dimensions

$table-sort-indicator-color:            #ccc;
$table-sort-indicator-color-active:     #000;

$table-sort-indicator-default:          url("data:image/svg+xml, <svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 27'> <path fill='#{$table-sort-indicator-color}' d='M7.2,22.6l-4.8-5.5c-0.6-0.6-0.1-1.7,0.8-1.7h9.6c0.6,0,1,0.4,1,1c0,0.2-0.1,0.5-0.2,0.7l-4.8,5.5C8.4,23,7.7,23.1,7.2,22.6 C7.3,22.7,7.2,22.7,7.2,22.6L7.2,22.6z'/><path fill='#{$table-sort-indicator-color}' d='M8.5,4.3l4.8,5.5c0.6,0.6,0.1,1.7-0.8,1.7H3c-0.6,0-1-0.4-1-1c0-0.2,0.1-0.5,0.2-0.7L7,4.3C7.4,3.9,8,3.9,8.5,4.3 C8.5,4.3,8.5,4.3,8.5,4.3L8.5,4.3z'/></svg>");
$table-sort-indicator-asc:              url("data:image/svg+xml, <svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 27'> <path fill='#{$table-sort-indicator-color-active}' d='M7.2,22.6l-4.8-5.5c-0.6-0.6-0.1-1.7,0.8-1.7h9.6c0.6,0,1,0.4,1,1c0,0.2-0.1,0.5-0.2,0.7l-4.8,5.5C8.4,23,7.7,23.1,7.2,22.6 C7.3,22.7,7.2,22.7,7.2,22.6L7.2,22.6z'/><path fill='#{$table-sort-indicator-color}' d='M8.5,4.3l4.8,5.5c0.6,0.6,0.1,1.7-0.8,1.7H3c-0.6,0-1-0.4-1-1c0-0.2,0.1-0.5,0.2-0.7L7,4.3C7.4,3.9,8,3.9,8.5,4.3 C8.5,4.3,8.5,4.3,8.5,4.3L8.5,4.3z'/></svg>");
$table-sort-indicator-desc:             url("data:image/svg+xml, <svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 27'> <path fill='#{$table-sort-indicator-color}' d='M7.2,22.6l-4.8-5.5c-0.6-0.6-0.1-1.7,0.8-1.7h9.6c0.6,0,1,0.4,1,1c0,0.2-0.1,0.5-0.2,0.7l-4.8,5.5C8.4,23,7.7,23.1,7.2,22.6 C7.3,22.7,7.2,22.7,7.2,22.6L7.2,22.6z'/><path fill='#{$table-sort-indicator-color-active}' d='M8.5,4.3l4.8,5.5c0.6,0.6,0.1,1.7-0.8,1.7H3c-0.6,0-1-0.4-1-1c0-0.2,0.1-0.5,0.2-0.7L7,4.3C7.4,3.9,8,3.9,8.5,4.3 C8.5,4.3,8.5,4.3,8.5,4.3L8.5,4.3z'/></svg>");

src/scss/_variables-dark.scss

$table-sort-indicator-color-dark:            $body-color-dark;
$table-sort-indicator-color-active-dark:     #fff;
$table-sort-indicator-default-dark:          url("data:image/svg+xml, <svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 27'> <path fill='#{$table-sort-indicator-color-dark}' d='M7.2,22.6l-4.8-5.5c-0.6-0.6-0.1-1.7,0.8-1.7h9.6c0.6,0,1,0.4,1,1c0,0.2-0.1,0.5-0.2,0.7l-4.8,5.5C8.4,23,7.7,23.1,7.2,22.6 C7.3,22.7,7.2,22.7,7.2,22.6L7.2,22.6z'/><path fill='#{$table-sort-indicator-color-dark}' d='M8.5,4.3l4.8,5.5c0.6,0.6,0.1,1.7-0.8,1.7H3c-0.6,0-1-0.4-1-1c0-0.2,0.1-0.5,0.2-0.7L7,4.3C7.4,3.9,8,3.9,8.5,4.3 C8.5,4.3,8.5,4.3,8.5,4.3L8.5,4.3z'/></svg>");
$table-sort-indicator-asc-dark:              url("data:image/svg+xml, <svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 27'> <path fill='#{$table-sort-indicator-color-active-dark}' d='M7.2,22.6l-4.8-5.5c-0.6-0.6-0.1-1.7,0.8-1.7h9.6c0.6,0,1,0.4,1,1c0,0.2-0.1,0.5-0.2,0.7l-4.8,5.5C8.4,23,7.7,23.1,7.2,22.6 C7.3,22.7,7.2,22.7,7.2,22.6L7.2,22.6z'/><path fill='#{$table-sort-indicator-color-dark}' d='M8.5,4.3l4.8,5.5c0.6,0.6,0.1,1.7-0.8,1.7H3c-0.6,0-1-0.4-1-1c0-0.2,0.1-0.5,0.2-0.7L7,4.3C7.4,3.9,8,3.9,8.5,4.3 C8.5,4.3,8.5,4.3,8.5,4.3L8.5,4.3z'/></svg>");
$table-sort-indicator-desc-dark:             url("data:image/svg+xml, <svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 27'> <path fill='#{$table-sort-indicator-color-dark}' d='M7.2,22.6l-4.8-5.5c-0.6-0.6-0.1-1.7,0.8-1.7h9.6c0.6,0,1,0.4,1,1c0,0.2-0.1,0.5-0.2,0.7l-4.8,5.5C8.4,23,7.7,23.1,7.2,22.6 C7.3,22.7,7.2,22.7,7.2,22.6L7.2,22.6z'/><path fill='#{$table-sort-indicator-color-active-dark}' d='M8.5,4.3l4.8,5.5c0.6,0.6,0.1,1.7-0.8,1.7H3c-0.6,0-1-0.4-1-1c0-0.2,0.1-0.5,0.2-0.7L7,4.3C7.4,3.9,8,3.9,8.5,4.3 C8.5,4.3,8.5,4.3,8.5,4.3L8.5,4.3z'/></svg>");

CSS

Sass variables

node_modules/bootstrap/scss/_variables.scss

$table-cell-padding-y:        .5rem;
$table-cell-padding-x:        .5rem;
$table-cell-padding-y-sm:     .25rem;
$table-cell-padding-x-sm:     .25rem;

$table-cell-vertical-align:   top;

$table-color:                 var(--#{$prefix}emphasis-color);
$table-bg:                    var(--#{$prefix}body-bg);
$table-accent-bg:             transparent;

$table-th-font-weight:        null;

$table-striped-color:         $table-color;
$table-striped-bg-factor:     .05;
$table-striped-bg:            rgba(var(--#{$prefix}emphasis-color-rgb), $table-striped-bg-factor);

$table-active-color:          $table-color;
$table-active-bg-factor:      .1;
$table-active-bg:             rgba(var(--#{$prefix}emphasis-color-rgb), $table-active-bg-factor);

$table-hover-color:           $table-color;
$table-hover-bg-factor:       .075;
$table-hover-bg:              rgba(var(--#{$prefix}emphasis-color-rgb), $table-hover-bg-factor);

$table-border-factor:         .2;
$table-border-width:          var(--#{$prefix}border-width);
$table-border-color:          var(--#{$prefix}border-color);

$table-striped-order:         odd;
$table-striped-columns-order: even;

$table-group-separator-color: currentcolor;

$table-caption-color:         var(--#{$prefix}secondary-color);

$table-bg-scale:              -80%;

Sass loops

node_modules/bootstrap/scss/_variables.scss

$table-variants: (
  "primary":    shift-color($primary, $table-bg-scale),
  "secondary":  shift-color($secondary, $table-bg-scale),
  "success":    shift-color($success, $table-bg-scale),
  "info":       shift-color($info, $table-bg-scale),
  "warning":    shift-color($warning, $table-bg-scale),
  "danger":     shift-color($danger, $table-bg-scale),
  "light":      $light,
  "dark":       $dark,
);

Customizing

The factor variables ($table-striped-bg-factor, $table-active-bg-factor & $table-hover-bg-factor) are used to determine the contrast in table variants.
Apart from the light & dark table variants, theme colors are lightened by the $table-bg-scale variable.