Source 
      
 
     Shadows
Add or remove shadows to elements with box-shadow utilities.
 
      
     On this page 
     
 
      
       
      
    
 
    Examples
While shadows on components are disabled by default in Bootstrap and can be enabled via $enable-shadows, you can also quickly add or remove a shadow with our box-shadowutility classes. Includes support for .shadow-noneand three default sizes (which have associated variables to match).
        no shadow
       
 
       
        small shadow
       
 
       
        regular shadow
       
 
       
        Larger shadow
       
 
      <div class="shadow-none p-3 mb-5 bg-light rounded">No shadow</div>
<div class="shadow-sm p-3 mb-5 bg-body rounded">Small shadow</div>
<div class="shadow p-3 mb-5 bg-body rounded">Regular shadow</div>
<div class="shadow-lg p-3 mb-5 bg-body rounded">Larger shadow</div>Sass
Variables
$box-shadow:                  0 .5rem 1rem rgba($black, .15);
$box-shadow-sm:               0 .125rem .25rem rgba($black, .075);
$box-shadow-lg:               0 1rem 3rem rgba($black, .175);
$box-shadow-inset:            inset 0 1px 2px rgba($black, .075);
Utilities API
Shadow utilities are declared in our utilities API in scss/_utilities.scss. Learn how to use the utilities API.
    "shadow": (
      property: box-shadow,
      class: shadow,
      values: (
        null: $box-shadow,
        sm: $box-shadow-sm,
        lg: $box-shadow-lg,
        none: none,
      )
    ),