JSFiddle - React, Tailwind, and code Playground

HTML

<select>
<option class="bg1">
</option>
<option class="bg2">
</option>
<option class="bg3">
</option>
</select>

CSS

select{width:100px;
position:absolute;
left:50%;
top:50%;
}

.bg1{background-color:#ff0000;}
.bg2{background-color:#f8ff00;}
.bg3{background-color:#424242;}