Opacity
Control the opacity of elements.
Opacity on Bootstrap<div class="opacity-100 text-white">100%</div>
<div class="opacity-75 text-white">85%</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%
85%
75%
50%
25%