* <li>an AWT colour name e.g. red</li>
* <li>an AWT hex rgb colour e.g. ff2288</li>
* <li>residue colours list e.g. D,E=red;K,R,H=0022FF;c=yellow</li>
* </ul>
* <li>an AWT colour name e.g. red</li>
* <li>an AWT hex rgb colour e.g. ff2288</li>
* <li>residue colours list e.g. D,E=red;K,R,H=0022FF;c=yellow</li>
* </ul>