Custom Bootstrap Colors

Install the SASS compiler from https://sass-lang.com/install - preferably the dart version.

Download the source file : https://github.com/twbs/bootstrap/archive/v5.2.0-beta1.zip

Get into the downloaded folder : cd bootstrap-5.2.0-beta1 This will be our base folder.

Say you're creating a new job board website and your new website's project name is instajobs (prefix: ij-)

Create a instajobs.scss in scss folder - so it'll be scss/instajobs.scss and type in this :

$primary: #ff8200;

$instajobs-colors: (
    "ij-main": #00ac9f,
);

@import "functions";
@import "variables";

$theme-colors: map-merge($theme-colors, $instajobs-colors);

@import "bootstrap";

1. Here we are re-defining the primary color of Bootstrap to #ff8200
2. We are defining a brand new color to the theme $instajobs-colors as ij-main which is #00ac9f
3. We need to add $instajobs-colors to $theme-colors which we do via map-merge
4. But before we can do map-merge we have to include the functions and variables defined in bootstrap - @import "functions"; @import "variables"; since $theme-colors are deifned in scss/_variables.scss.
5. Finally we import bootstrap.scss

Run the following in terminal : sass scss/instajobs.scss css/instajobs.css

The above command will compile the entire bootstrap source files including our custom instajobs.scss to a generated file called instajobs.css in the css folder.

Create example.html in the base folder referencing css/instajobs.css

<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Custom Bootstrap Colors Demo</title>
    <link href="css/instajobs.css" rel="stylesheet" />
  </head>
  <body>
    <h1>Hello, world!</h1>

    <button type="button" class="btn btn-primary">Primary</button>
    <button type="button" class="btn btn-secondary">Secondary</button>
    <button type="button" class="btn btn-success">Success</button>
    <button type="button" class="btn btn-danger">Danger</button>
    <button type="button" class="btn btn-warning">Warning</button>
    <button type="button" class="btn btn-info">Info</button>
    <button type="button" class="btn btn-light">Light</button>
    <button type="button" class="btn btn-dark">Dark</button>

    <button type="button" class="btn btn-ij-main">instajobs main color</button>    

  </body>
</html>

Now open example.html in the browser by double-clicking the file in your folder.

You'll see something like this :

The primary color has been changed to an orange variant and a custom color called ij-main which is considered a main color for the instajobs site is something of a green shade.

Read more at : https://getbootstrap.com/docs/5.2/customize/sass/

MAJOR UPDATE :
This example SASS code in instajobs.scss works only from Bootstrap 5.2.x onwards, since in 5.2.x, the authors have segregated the theme-colors variables defined in _variables.scss from theme-colors-rgb, utilities-text-colors etc into another file called _maps.scss

@import "functions";
@import "variables";
@import "maps";

From Bootstrap 5.1 and below, the code in _maps.scss was in _variables.scss.