I've deprecated the Nick Colors userscript, and it's been merged into Atmospheric Modulator with more usability additions:

Features:

1. usernames on the site get hashed colors (the same for everyone using the script everywhere)
2. on hover/click images will show you the real image instead of the dithered image
3. keep little personal notes (private) on users so you can remember who they are. show on hover.
4. adjust the nick colors...