JSFiddle - React, Tailwind, and code Playground

HTML

<div class="foo">
    <div class="bar" id="one">
        bar1
    </div>
</div>
<div class="bar" id="two">
bar2
</div>

CSS

div {
    height: 100px;
    width: 100px;
    border: 1px solid black;
}

.bar:not(#one) {
    background-color: blue;
}