JSFiddle - React, Tailwind, and code Playground

HTML

<div class="body-bg-color">

    <div class="glass-bg-color">
    Foo
    </div>
    
    <div class="glass-bg-color">
    Bar
    </div>
    
    <div class="glass-bg-color">
    Baz
    </div>

</div>

CSS

body {
    position: relative;
    width: 100%;
    background: #00467F;
    background: -webkit-linear-gradient(left, #A5CC82, #00467F);
    background: -moz-linear-gradient(left, #A5CC82, #00467F);
    background: -o-linear-gradient(left, #A5CC82, #00467F);
    background: linear-gradient(to right, #A5CC82, #00467F);   
}
    
  
.glass-bg-color {
    position: relative;
    display: inline-block;
    float: left;
    margin: 20px;
    width: 200px;
    height: 200px;
    border-radius: 4px;
    text-align: center;
    background-color: rgba(255,255,255,.08);
    color: white;
}