[html] How can I create a small color box using html and css?

You can create these easily using the floating ability of CSS, for example. I have created a small example on Jsfiddle over here, all the related css and html is also provided there.

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.foo {_x000D_
  float: left;_x000D_
  width: 20px;_x000D_
  height: 20px;_x000D_
  margin: 5px;_x000D_
  border: 1px solid rgba(0, 0, 0, .2);_x000D_
}_x000D_
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.blue {_x000D_
  background: #13b4ff;_x000D_
}_x000D_
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.purple {_x000D_
  background: #ab3fdd;_x000D_
}_x000D_
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.wine {_x000D_
  background: #ae163e;_x000D_
}
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<div class="foo blue"></div>_x000D_
<div class="foo purple"></div>_x000D_
<div class="foo wine"></div>
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