<ul class="list">
  <li>
    <div>青</div>
  </li>
  <li>
    <div class="color-red">赤<div>
  </li>
</ul>
.list li .color-red {
    color: red;
}

.list li:not(.color-red) {
    color: blue;
}

External CSS

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External JavaScript

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