A short video demonstrating how to use Ponify with Opera and Safari. The first video of this two part series is available here: http://www.youtube.com/watch?v=xsMgwPSxPgM

Hex Colour Chart: http://www.december.com/html/spec/colorhex.html
NinjaKit: http://d.hatena.ne.jp/os0x/20100612/1276330696

Blog: http://pterocorn.blogspot.com
Ponify Post: http://pterocorn.blogspot.com/2011/10/ponify.html

Firefox: http://ponify.n0m.org/?b=firefox
Chrome: http://ponify.n0m.org/?b=chrome
Opera: http://ponify.n0m.org/?b=opera
Userscript: http://ponify.n0m.org/?b=userscript

UPDATE:
One very awesome guy has made an actual safari extension, which is probably preferable to messing about with NinjaKit. You can find it here: https://github.com/kballard/Ponify-Safari