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          <p>You can use <strong>rgba()</strong> color codes:</p>
<ul><li>the first 3 values are for <code>rgb</code></li><li>the 4th value is for the <code>alpha</code> channel and defines the opacity of the color</li></ul><p>The alpha value can go from zero <strong>0</strong> (transparent) to one <strong>1</strong> (opaque).</p>

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