Thank you. I asked, and seems like the color theme is only available to the LCDs with navigation.The "Color Theme" looks to be new to 2011 (page 4-16 of your Owners Manual) - not much info on it tho. Figure it out or have your dealer explain it to you and report back what you find.
Edit: BTW, Are you trying to change the color while moving? I wonder if this is another one of those options that you can only change while parked.