tailwind opacity
<div class="bg-light-blue-600 opacity-100 ..."></div>
<div class="bg-light-blue-600 opacity-75 ..."></div>
<div class="bg-light-blue-600 opacity-50 ..."></div>
<div class="bg-light-blue-600 opacity-25 ..."></div>
<div class="bg-light-blue-600 opacity-0 ..."></div>