If you are wanting to try to do this yourself before sending it off paying a premium (I have looked into it as well for my G46VW), here's how I'd be doing it:
1) Watch this video by JwPwns1:
http://www.youtube.com/watch?v=Y7Ut1FGFj0s until the keyboard is out
2) Get some plastic/acetate film of your color choice
3) Hears where I'm not sure (I have opened my laptop to install my mSATA SSD but didn't pay too much attention to the keyboard), figure out where the keyboard LEDs are located & put the cut to size plastic/acetate film between the LEDs & keyboard keys
4) Close everything up using JwPwns1 other video:
http://www.youtube.com/watch?v=cOvXRuB9bscLet's say you you are really wanting the ROG emblem light colored as well ( I would), I'd watch this video:
http://www.youtube.com/watch?v=DmI9IdtrLp8 then do similar to what I mentioned above.
I plan on doing all this myself but have not had time to do so. When I do, I will post an official how-to but for the most part, what I mentioned above is how'd I go about doing it.
G46VW I Best Buy Stock I 128GB mSATA I Windows 8.1