Modification to my version

Hello all :D
I don't know if you can help me with this
I want this (http://nulledbb.com/Thread-Color-picker-for-1-8) but for 1.6.16, i think it's possible to do this by editing 1.8 variables to 1.6 ones, but i don't know which are they.
I have some theme and plugin problems when i upgrade to 1.8 :/

I will be happy too if you tell me a function to stock the color information in the data base and another to extract it. I'm a noob in PHP/MySQL, i only know very much HTML/CSS/JS. But i understand a bit how PHP works, the syntaxe.

Thank you :DDD

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Don't be afraid i don't want to copy yours :3
I saw this in many forums and i love it, right now i'm using changing color by theme changing (You click in buttons, then it changes the theme id you're using, but it changes only the color because only CSS texts are differents between these themes)