CSS3 Scrollbar-color

<!DOCTYPE html>
<title>Example</title>
<style>
body {
  font-family: sans-serif;
  padding: 10px;
}
.scroll-demo {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 10px;
}
.scroll-box {
  width: 220px;
  height: 120px;
  overflow-y: scroll;
  border: 1px solid #ccc;
  border-radius: 6px;
  padding: 8px;
  font-size: 14px;
  line-height: 1.6;
}
.box-purple {
  scrollbar-color: #7c3aed #ede9fe;
}
.box-teal {
  scrollbar-color: #0d9488 #ccfbf1;
}
.box-default {
  /* no scrollbar-color â€” uses the browser default */
}
.box-label {
  font-size: 12px;
  color: #555;
  margin-top: 4px;
  text-align: center;
  width: 220px;
}
</style>

<div class="scroll-demo">
  <div>
    <div class="scroll-box box-purple">
      <p>This box has a purple thumb on a light purple track. Scroll down to see more content. More content here. Even more content. Keep scrolling...</p>
    </div>
    <div class="box-label">scrollbar-color: #7c3aed #ede9fe</div>
  </div>
  <div>
    <div class="scroll-box box-teal">
      <p>This box has a teal thumb on a light teal track. Scroll down to see more content. More content here. Even more content. Keep scrolling...</p>
    </div>
    <div class="box-label">scrollbar-color: #0d9488 #ccfbf1</div>
  </div>
  <div>
    <div class="scroll-box box-default">
      <p>This box uses the browser's default scrollbar styling. Scroll down to see more content. More content here. Even more content. Keep scrolling...</p>
    </div>
    <div class="box-label">No scrollbar-color (browser default)</div>
  </div>
</div>