ok. I've done all the dirty work!
I've implemented the new color management in the console, in the input field of the player name, in the nicknames autocompletion and in the players list of a server.
Some instruction to use the new colors:
1. ^xrgb where r, g, b are hexadecimal numbers (0-f) representing red, green and blue components of the color.
2. ^ah where h is a hexadecimal number (0-f), sets the alpha of the following text (alpha is the contrary of transparency, so low alpha means high transparency).
If u use ^[0-9] after a ^ah, the alpha value is ignored (old colors have its own alpha), but it will be applied when u will use again another ^xrgb. Actually, if u want to keep the transparency, don't use old colors.
3. ^a+ or ^a- increase or decrease the previous alpha by 1. If previously the alpha isn't defined, they do nothing.
I've tested it out well and it works fine... on Windows! I hope that all works fine also in linux and mac (there should be no problem).
Page where download the last version of the patch: http://sites.google.com/site/terencehill/Nexuiz
Included in the zip there is a cfg file to quickly test the new colors out: put testnewcolors.cfg in your Nexuiz/data directory, open the console and type exec testnewcolors.cfg