JSFiddle - React, Tailwind, and code Playground

by Jeff

HTML

<div class="orb"></div>
<div class="orb red"></div>
<div class="orb green"></div>
<div class="orb blue"></div>

CSS

* {
    box-sizing: border-box;
}

.orb {
    border: 2px solid #000;
    border-radius: 200px;
    display: inline-block;
    width: 24px;
    height: 24px;
    background: linear-gradient(#CCCCCC, #999999);
    text-align: center;
}

.orb:after {
    display:inline-block;
    width: 14px;
    height: 10px;
    background: #FFF;
    content: "";
    border-radius: 200px;
    margin-bottom: 2px;
    background: linear-gradient(#FFF, rgba(0,0,0,0));
}

.orb.red {
    background: linear-gradient(#CC2929, #993D3D);
}

.orb.green {
    background: linear-gradient(#5FCC29, #5C993D);
}

.orb.blue {
    background: linear-gradient(#297BCC, #3D6B99);
}