Opacity
Control the opacity of elements.
Opacity on BootstrapExample
The opacity property sets the opacity level for an element. The opacity level describes the transparency level, where 1 is not transparent at all, .5 is 50% visible, and 0 is completely transparent.
Set the opacity of an element using .opacity-{value} utilities.
<div class="opacity-100 text-white">100%</div>
<div class="opacity-75 text-white">75%</div>
<div class="opacity-50 text-white">50%</div>
<div class="opacity-25 text-white">25%</div>100%
75%
50%
25%