JSFiddle - React, Tailwind, and code Playground

HTML

<div class="circle">
    <i class="icon-wrench"></i>
</div>

CSS

@import url(http://vasterad.com/themes/astrum/css/icons.css);


.circle{
    transition-duration: 0.5s;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: #f89;
}

.circle:hover{
    background: #ff8;
}

.circle:hover i{
    color: red ;
}

.circle i{
    transition-duration: 0.5s;
    color: #fff;
    float: left;
    font-size: 18px;
    left: 37%;
    margin: 20px 0;
    position: relative;
    z-index: 5;
}