Hướng dẫn bootstrap button color change

2022 Update for Bootstrap 5

Bootstrap 5 has the same button-variant and button-outline-variant SASS mixins which can be used to customize the button color after bootstrap is imported...

/* import the Bootstrap */
@import "bootstrap";

/* ------- customize primary button color -------- */   
$mynewcolor:#77cccc;

.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://codeply.com/p/UNvB5hRsfF

2019 Update for Bootstrap 4

Now that Bootstrap 4 uses SASS, you can easily change the primary button color using the button-variant mixins:

$mynewcolor:#77cccc;

.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://codeply.com/p/JnV3xDDiaH (SASS demo)

This SASS compiles into the following CSS...

.btn-primary {
    color: #212529;
    background-color: #7cc;
    border-color: #5bc2c2
}

.btn-primary:hover {
    color: #212529;
    background-color: #52bebe;
    border-color: #8ad3d3
}

.btn-primary:focus,
.btn-primary.focus {
    box-shadow: 0 0 0 .2rem rgba(91, 194, 194, 0.5)
}

.btn-primary.disabled,
.btn-primary:disabled {
    color: #212529;
    background-color: #7cc;
    border-color: #5bc2c2
}

.btn-primary:not(:disabled):not(.disabled):active,
.btn-primary:not(:disabled):not(.disabled).active,
.show>.btn-primary.dropdown-toggle {
    color: #212529;
    background-color: #9cdada;
    border-color: #2e7c7c
}

.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(91, 194, 194, 0.5)
}

.btn-outline-primary {
    color: #7cc;
    background-color: transparent;
    background-image: none;
    border-color: #7cc
}

.btn-outline-primary:hover {
    color: #222;
    background-color: #8ad3d3;
    border-color: #7cc
}

.btn-outline-primary:focus,
.btn-outline-primary.focus {
    box-shadow: 0 0 0 .2rem rgba(119, 204, 204, 0.5)
}

.btn-outline-primary.disabled,
.btn-outline-primary:disabled {
    color: #7cc;
    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: #212529;
    background-color: #8ad3d3;
    border-color: #7cc
}

.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(119, 204, 204, 0.5)
}

https://codeply.com/go/lD3tUE01lo (CSS demo)

To change the primary color for all classes see: Customizing Bootstrap CSS template and How to change the bootstrap primary color?

Use Bootstrap’s custom button styles for actions in forms, dialogs, and more with support for multiple sizes, states, and more.

Examples

Bootstrap includes several predefined button styles, each serving its own semantic purpose, with a few extras thrown in for more control.

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

 type="button" class="btn btn-link">Link

Conveying meaning to assistive technologies

Using color to add meaning only provides a visual indication, which will not be conveyed to users of assistive technologies – such as screen readers. Ensure that information denoted by the color is either obvious from the content itself (e.g. the visible text), or is included through alternative means, such as additional text hidden with the .sr-only class.

The .btn classes are designed to be used with the element. However, you can also use these classes on or elements (though some browsers may apply a slightly different rendering).

When using button classes on elements that are used to trigger in-page functionality (like collapsing content), rather than linking to new pages or sections within the current page, these links should be given a role="button" to appropriately convey their purpose to assistive technologies such as screen readers.

 class="btn btn-primary" href="#" role="button">Link
 class="btn btn-primary" type="submit">Button

class="btn btn-primary" type="button" value="Input"> class="btn btn-primary" type="submit" value="Submit"> class="btn btn-primary" type="reset" value="Reset">

Outline buttons

In need of a button, but not the hefty background colors they bring? Replace the default modifier classes with the .btn-outline-* ones to remove all background images and colors on any button.

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

Sizes

Fancy larger or smaller buttons? Add .btn-lg or .btn-sm for additional sizes.

 type="button" class="btn btn-primary btn-lg">Large button
 type="button" class="btn btn-secondary btn-lg">Large button

 type="button" class="btn btn-primary btn-sm">Small button
 type="button" class="btn btn-secondary btn-sm">Small button

Create block level buttons—those that span the full width of a parent—by adding .btn-block.

 type="button" class="btn btn-primary btn-lg btn-block">Block level button
 type="button" class="btn btn-secondary btn-lg btn-block">Block level button

Active state

Buttons will appear pressed (with a darker background, darker border, and inset shadow) when active. There’s no need to add a class to s as they use a pseudo-class. However, you can still force the same active appearance with .active (and include the aria-pressed="true" attribute) should you need to replicate the state programmatically.

 href="#" class="btn btn-primary btn-lg active" role="button" aria-pressed="true">Primary link
 href="#" class="btn btn-secondary btn-lg active" role="button" aria-pressed="true">Link

Disabled state

Make buttons look inactive by adding the disabled boolean attribute to any

element.

 type="button" class="btn btn-lg btn-primary" disabled>Primary button

type="button" class="btn btn-secondary btn-lg" disabled>Button

Disabled buttons using the element behave a bit different:

• s don’t support the disabled attribute, so you must add the .disabled class to make it visually appear disabled.
• Some future-friendly styles are included to disable all pointer-events on anchor buttons. In browsers which support that property, you won’t see the disabled cursor at all.
• Disabled buttons should include the aria-disabled="true" attribute to indicate the state of the element to assistive technologies.

 href="#" class="btn btn-primary btn-lg disabled" role="button" aria-disabled="true">Primary link
 href="#" class="btn btn-secondary btn-lg disabled" role="button" aria-disabled="true">Link

Link functionality caveat

The .disabled class uses pointer-events: none to try to disable the link functionality of s, but that CSS property is not yet standardized. In addition, even in browsers that do support pointer-events: none, keyboard navigation remains unaffected, meaning that sighted keyboard users and users of assistive technologies will still be able to activate these links. So to be safe, add a tabindex="-1" attribute on these links (to prevent them from receiving keyboard focus) and use custom JavaScript to disable their functionality.

Button plugin

Do more with buttons. Control button states or create groups of buttons for more components like toolbars.

Toggle states

Add data-toggle="button" to toggle a button’s active state. If you’re pre-toggling a button, you must manually add the .active class and aria-pressed="true" to the .

 type="button" class="btn btn-primary" data-toggle="button" aria-pressed="false" autocomplete="off">
  Single toggle

Checkbox and radio buttons

Bootstrap’s .button styles can be applied to other elements, such as s, to provide checkbox or radio style button toggling. Add data-toggle="buttons" to a .btn-group containing those modified buttons to enable their toggling behavior via JavaScript and add .btn-group-toggle to style the s within your buttons. Note that you can create single input-powered buttons or groups of them.

The checked state for these buttons is only updated via click event on the button. If you use another method to update the input—e.g., with or by manually applying the input’s checked property—you’ll need to toggle .active on the manually.

Note that pre-checked buttons require you to manually add the .active class to the input’s .

 class="btn-group-toggle" data-toggle="buttons">
   class="btn btn-secondary active">
     type="checkbox" checked autocomplete="off"> Checked