JSFiddle - React, Tailwind, and code Playground

HTML

<span id="toolbar">
		<span>
            <img width="16" height="16" src="" />
		</span>
		<span> 
            <img width="16" height="16" src="" />
		</span>
		<span>
            <img width="16" height="16" src="" />
		</span>
		<span>
            <img width="16" height="16" src="" />
		</span>
	</span>

CSS

body {
	font: 62.5%/1.4 Arial, Helvetica, Verdana, sans-serif;
}

span > span {
	background: red;
}

span {
	display: inline-block;
}