how to change bootstrap version 4 button color

Question

I can change the primary button color by changing the theme-color in bootstrap v4. But it affects all other components as well. How to set the primary button colour without affecting the theme color? I dont want to set brand-primary and achieve it.Any other alternatives?

Solution 1

2019 Update for Bootstrap 4.1+

Now that Bootstrap 4 uses SASS, you can easily change only the button color using the button-variant mixins. Since you only want to change the primary button color, and not the entire primary theme color, you need to use the button-variant mixins in SASS. You can set whatever $mynewcolor and/or lighten() and darken() percentages you'd like.

$mynewcolor:teal;

.btn-primary {
    @include button-variant($mynewcolor, darken($mynewcolor, 7.5%), darken($mynewcolor, 10%), lighten($mynewcolor,5%), lighten($mynewcolor, 10%), darken($mynewcolor,30%));
}

.btn-outline-primary {
    @include button-outline-variant($mynewcolor, #222222, lighten($mynewcolor,5%), $mynewcolor);
}

https://www.codeply.com/go/f3uTwmsCVZ (SASS demo)

This SASS compiles into the following CSS...

.btn-primary{color:#fff;background-color:teal;border-color:#005a5a}

.btn-primary:hover{color:#fff;background-color:#004d4d;border-color:#009a9a}
.btn-primary:focus,.btn-primary.focus{box-shadow:0 0 0 .2rem rgba(0,90,90,0.5)}
.btn-primary.disabled,.btn-primary:disabled{color:#fff;background-color:teal;border-color:#005a5a}
.btn-primary:not(:disabled):not(.disabled):active,.btn-primary:not(:disabled):not(.disabled).active,.show>.btn-primary.dropdown-toggle{color:#fff;background-color:#00b3b3;border-color:#000}
.btn-primary:not(:disabled):not(.disabled):active:focus,.btn-primary:not(:disabled):not(.disabled).active:focus,.show>.btn-primary.dropdown-toggle:focus{box-shadow:0 0 0 .2rem rgba(0,90,90,0.5)}

.btn-outline-primary{color:teal;background-color:transparent;background-image:none;border-color:teal}.btn-outline-primary:hover{color:#222;background-color:#009a9a;border-color:teal}
.btn-outline-primary:focus,.btn-outline-primary.focus{box-shadow:0 0 0 .2rem rgba(0,128,128,0.5)}
.btn-outline-primary.disabled,.btn-outline-primary:disabled{color:teal;background-color:transparent}
.btn-outline-primary:not(:disabled):not(.disabled):active,.btn-outline-primary:not(:disabled):not(.disabled).active,.show>.btn-outline-primary.dropdown-toggle{color:#fff;background-color:#009a9a;border-color:teal}
.btn-outline-primary:not(:disabled):not(.disabled):active:focus,.btn-outline-primary:not(:disabled):not(.disabled).active:focus,.show>.btn-outline-primary.dropdown-toggle:focus{box-shadow:0 0 0 .2rem rgba(0,128,128,0.5)}

https://www.codeply.com/go/l9UGO7J6V1 (CSS demo)

---

To change the primary color for all contextual classes (bg-primary, alert-primary, etc..) see: Customizing Bootstrap CSS template and How to change the bootstrap primary color?

Also see:
https://stackoverflow.com/a/50973207/171456
How to theme bootstrap

Solution 2

Try this method

Add a class to the button , Here custom-btn and write the css for that in our stylesheet.

.btn-primary.custom-btn {
	background-color: #000;
	border-color: #000;
}

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet"/>

<div class="container">
	<button type="button" class="btn btn-primary custom-btn">Custom</button>
  <button type="button" class="btn btn-primary">Default</button>
</div>

Solution 3

You can add custom color or redefine colors by change them via variables in sass files (Bootstrap 4).

$theme-colors: (
   primary: red,
);
@import "~bootstrap/scss/bootstrap";

If you use same keys for your colors, you will redefine Bootstrap. Otherwise, with new keys you create new classes.

This example set primary color from blue to red.

Solution 4

As per bootstrap documentation

Many of Bootstrap’s components are built with a base-modifier class approach. This means the bulk of the styling is contained to a base class (e.g., .btn) while style variations are confined to modifier classes (e.g., .btn-danger). These modifier classes are built from the $theme-colors map to make customizing the number and name of our modifier classes.

So If you change theme color then it will affect all.

Maybe you should add color in $theme-colors variable if you want to use that color other places as well.

Solution 5

I had a similar problem: I wanted to make the button match its container colors.

So I created a btn class that adapts automatically to its parent color on page load. I'm pretty happy with the result (In fact I'm even creating a little plugin). JSfiddle here

/*
** Author: Jean-Marc Zimmer
** Licence: MIT
*/

$(function() {

  const hexDigits = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F"];

  function hex(x) {
    return isNaN(x) ? "00" : hexDigits[(x - x % 16) / 16] + hexDigits[x % 16];
  }
  function hexify(rgb) {
    rgb = rgb.match(/^rgb\((\d+),\s*(\d+),\s*(\d+)\)$/);
    return "#" + hex(rgb[1]) + hex(rgb[2]) + hex(rgb[3]);
  }
  function darken(rgb) {
    rgb = rgb.match(/^rgb\((\d+),\s*(\d+),\s*(\d+)\)$/);
    return "rgb(" + parseInt(0.9 * rgb[1]) + ',' + parseInt(0.88 * rgb[2]) + ',' + parseInt(0.87 * rgb[3]) + ')';
  }

  function getParentBackground($elem) {
    var color = $elem.css("background-color");
    if (color && color !== 'rgba(0, 0, 0, 0)')
      return color;
    return ($elem.is('body') ? false : getParentBackground($elem.parent()));
  }

  function getParentColor($elem) {
    var color = $elem.css("color");
    if (color && color !== 'rgba(0, 0, 0, 0)')
      return color;
    return ($elem.is('body') ? false : getParentColor($elem.parent()));
  }

  $('.btn-negative, .btn-outline-negative').each(function() {
    var bgColor = hexify(getParentBackground($(this).parent()));
    var color = hexify(getParentColor($(this).parent()));
    var rgb = getParentColor($(this).parent());
    this.style.setProperty('--btn-negative-color0', bgColor);
    this.style.setProperty('--btn-negative-color1', color);
    this.style.setProperty('--btn-negative-shadow-color', color + "88");
    this.style.setProperty('--btn-negative-color2', hexify(darken(rgb)));
    this.style.setProperty('--btn-negative-color3', hexify(darken(darken(rgb))));
  });

});

/*
** Author: Jean-Marc Zimmer
** Licence: MIT
*/

.btn-negative::before,
.btn-outline-negative::before {
  --btn-negative-color0: #fff;
  --btn-negative-color1: #000;
  --btn-negative-color2: #000;
  --btn-negative-color3: #000;
  --btn-negative-shadow-color: #0008;
}

.btn-outline-negative {
    background-color: var(--btn-negative-color0);
    border: solid 1px var(--btn-negative-color1);
    color: var(--btn-negative-color1);
}

.btn-negative,
.btn-outline-negative.active,
.btn-outline-negative:hover:not(.disabled):not([disabled]),
.btn-outline-negative:active:not(.disabled):not([disabled]) {
    background-color: var(--btn-negative-color1);
    color: var(--btn-negative-color0);
}

.btn-negative.active,
.btn-negative:hover:not(.disabled):not([disabled]),
.btn-negative:active:not(.disabled):not([disabled]) {
    background-color: var(--btn-negative-color2);
    color: var(--btn-negative-color1);
}

.btn-negative.active:hover,
.btn-negative:hover:active:not(.disabled):not([disabled]) {
    background-color: var(--btn-negative-color3);
    color: var(--btn-negative-color1);
}

.btn-negative:focus,
.btn-outline-negative:focus {
    box-shadow: 0 0 0 .2rem var(--btn-negative-shadow-color);
}

<link rel="stylesheet" type="text/css" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css" />
<script src="https://code.jquery.com/jquery-3.3.1.min.js" type="text/javascript"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" type="text/javascript"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js" type="text/javascript"></script>

<div class="container">
    <div class="alert alert-success">
        <p>Some text...</p>
        <button class="btn btn-success">btn-success</button>
        <button class="btn btn-negative">btn-negative</button>
        <button class="btn btn-outline-success">btn-outline-success</button>
        <button class="btn btn-outline-negative">btn-outline-negative</button>
    </div>
</div>

Due to the CSS call order in the snippet, the style doesn't apply correctly.

Any idea to make it better is welcomed !

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