Opacity Utilities
Change the opacity of any element
Add u-opacity-{level} to quickly change the opacity of any element based on the level specified.
This is heavy opacity
This is medium opacity
This is light opacity
This is zero opacity
<h3 class="u-opacity-heavy">This is heavy opacity</h3>
<h3 class="u-opacity-medium">This is medium opacity</h3>
<h3 class="u-opacity-light">This is light opacity</h3>
<h3 class="u-opacity-zero">This is zero opacity</h3>