ICZen Replace Green Color

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http://forum.xda-developers.com – I want to change the default green to the stock blue color because it doesn't put me in a good mood and the black background for messaging makes it seem like I'm in a DOS or IRC chat. It's the reason I wanted to keep using ICS Passion, but the clock freezes randomly for me so I chose ICZen instead. I found a stock blue theme made for ICZen v1.7, but newest is ICZen v1.85. Is it safe to flash that stock blue v1.7 theme? Is there another way to change colors rather than Galaxy S Settings>Color Tuning? The color tuning doesn't seem to give it a normal color change. (HowTos)