JSFiddle - React, Tailwind, and code Playground

HTML

<select size='3'>
<option>Ketchup</option>
<option>Mostarda</option>
<option>Barbecue</option>
</select>

CSS

select{
	height: 100%;
	margin: auto 5px;
	padding: 5px;
	border-radius: 4px;
	text-align: center;
	overflow:hidden;
	outline: none;
}

select option:checked{
	box-shadow: 0 0 10px 100px #ddd inset;
}