JSFiddle - React, Tailwind, and code Playground

HTML

<div class="outer">
    <div class="tab">
        <button>
            <img src="http://www.insideredbox.com/images/ball_red.png">
        </button><button>
            <img src="http://www.insideredbox.com/images/ball_red.png">
        </button>
    </div>
    <div class="inner">
        Test123
    </div>
</div>

CSS

.outer {
    background-color: gray;
    padding: 10px;
}
.inner {
    background-color: blue;
    padding: 10px;
}
.tab {
    background-color: red;
}