title: Convert a RGB Color Value to a Hexadecimal String
body: <p>In my Java application, I was able to get the <code>Color</code> of a <code>JButton</code> in terms of red, green and blue; I have stored these values in three <code>int</code>s.</p>
  
  <p>How do I convert those RGB values into a <code>String</code> containing the equivalent hexadecimal representation? Such as <code>#0033fA</code></p>