Customizing Bootstrap CSS Template

Customizing Bootstrap CSS template

The best thing to do is.

1. fork twitter-bootstrap from github and clone locally.

they are changing really quickly the library/framework (they diverge internally. Some prefer library, i'd say that it's a framework, because change your layout from the time you load it on your page). Well... forking/cloning will let you fetch the new upcoming versions easily.

2. Do not modify the bootstrap.css file

It's gonna complicate your life when you need to upgrade bootstrap (and you will need to do it).

3. Create your own css file and overwrite whenever you want original bootstrap stuff

if they set a topbar with, let's say, color: black; but you wan it white, create a new very specific selector for this topbar and use this rule on the specific topbar. For a table for example, it would be <table class="zebra-striped mycustomclass">. If you declare your css file after bootstrap.css, this will overwrite whatever you want to.

How to customize Bootstrap 5 color scheme with CSS?

Short answer: You can't easily change the entire color scheme using CSS. Use SASS to change the color scheme

However, you can override specific Bootstrap style using CSS overrides.

The concept is the same regardless of Bootstrap version. As explained in the duplicate..

"you can override the Bootstrap CSS by adding CSS rules that follow
after the bootstrap.css and use the correct CSS specificity"...

For example..

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-F3w7mX95PdgyTmZZMECAngseQB83DfGTowi0iMjiWaeVhAn4FJkqJByhZMI3AhiU" crossorigin="anonymous">
  <style>
  /* override bootstrap styles */
  body {
     background-color: pink;
  } 
  </style>
  <title>Hello, world!</title>
</head>

Or put the overrides in a separate CSS file and reference that file,

"One way to customize is simply using CSS to override Bootstrap CSS.
For maintainability, CSS customizations are put in a separate
custom.css file, so that the bootstrap.css remains unmodified. The
reference to the custom.css follows after the bootstrap.css for the
overrides to work..."

Finally,

"When making customizations, you should understand CSS Specificity.
Overrides in the custom.css need to use selectors that are the same
specificity as (or more specific) the bootstrap.css"

Codeply

How to Customize Bootstrap 4

https://v4-alpha.getbootstrap.com/about/license/

Read the first couple Lines. Bootstrap has an MIT open source license. you can find more on that here. https://en.wikipedia.org/wiki/MIT_License

You can copy and paste the code that you want however you must keep the Copyright title intact for the pieces that you use from bootstrap.

Create your own theme in Bootstrap 4.5

Only navbar-light and navbar-dark effect the text color of the navbar. Using navbar-dark should work fine: http://codeply.com/p/UAWVfUy3VX -- since the blue is darker.

SASS

$myown: #0066CC;
$theme-colors: ("myown": #0166CC);

@import "bootstrap";

HTML

<nav class="navbar navbar-expand-md navbar-dark bg-myown">...</nav>

Also see: Customizing Bootstrap CSS template

How to change the bootstrap primary color?

Bootstrap 5 (update 2021)

The method is still the same for Bootstrap 5.

https://codeply.com/p/iauLPArGqE

Bootstrap 4

To change the primary, or any of the theme colors in Bootstrap 4 SASS, set the appropriate variables before importing bootstrap.scss. This allows your custom scss to override the !default values...

$primary: purple;
$danger: red;

@import "bootstrap";

Demo: https://codeply.com/go/f5OmhIdre3

In some cases, you may want to set a new color from another existing Bootstrap variable. For this @import the functions and variables first so they can be referenced in the customizations...

/* import the necessary Bootstrap files */
@import "bootstrap/functions";
@import "bootstrap/variables";

$theme-colors: (
  primary: $purple
);

/* finally, import Bootstrap */
@import "bootstrap";

Demo: https://codeply.com/go/lobGxGgfZE

Also see: this answer, this answer or changing the button color in (CSS or SASS)

It's also possible to change the primary color with CSS only but it requires a lot of additional CSS since there are many -primary variations (btn-primary, alert-primary, bg-primary, text-primary, table-primary, border-primary, etc...) and some of these classes have slight colors variations on borders, hover, and active states. Therefore, if you must use CSS it's better to use target one component such as changing the primary button color.

How to Customize Bootstrap 4.3 from BootstrapCDN

If it is a class in bootstrap you want overridden, you would need to add something like this: .class { color:red !important; }

It is basically saying like apply this style. It will have priority over other styles the same class has, regardless of order in your stylesheet.

bootstrap custom css file

Of course you can, first create custom.css and put it in _files then in shared.html find the line that includes the bootstrap css file add this after:

<link type="text/css" rel="stylesheet" href="_files/custom.css" />

You also need to include http:// for the two bootstrap files and finally check that your using the right selector; to change the colors of .navbar-inner you should be using .navbar-inverse .navbar-inner

Customizing Bootstrap CSS Template