JSFiddle - React, Tailwind, and code Playground

HTML

<body>
  <div class="wrapper">
    <div class="color-block ok">
      <span>This is a long long long long long text.</span>
    </div>
  </div>
  <div class="wrapper">
    <div class="color-block no">
      <span>This is a long long long long long text.</span>
    </div>
  </div>
</body>

CSS

body {
  top: 0;
  left: 0;
  margin: 0;
  padding: 20px 20px;
}

.wrapper {
  padding: 5px 10px;
}

.color-block {
  display: inline-block;
  position: relative;
  padding: 10px 10px;
  background: yellow;
}

.color-block::before {
  content: '';
  height: 100%;
  width: 10%;
  display: block;
  position: absolute;
  left: -20px;
  top: 0;
}

.ok::before {
  background: green;
}

.no::before {
  background: red;
}