title: How to convert number to argb value?
body: <p>How can you convert a number into an <code>argb</code> value such that</p>
  
  <pre><code>0 -&gt; 0,0,0,0
  1 -&gt; 0,0,0,1
  ...
  (16^8)-1 -&gt; 255,255,255,255
  </code></pre>
  
  <p>and vice versa so </p>
  
  <pre><code>0,0,0,0 -&gt; 0
  0,0,0,1 -&gt; 1
  ...
  255,255,255,255 -&gt; (16^8)-1
  </code></pre>
  
  <p>Thanks</p>