hmm just looking around for how to get into the service menu of the tv
have a look at this thread here, perhaps try some of the methods (they suggest a couple of different ways) for getting into the service menu:
http://www.avsforum.com/forum/64-direct-view-single-tube-crt-displays/703101-need-help-getting-into-rca-27v550t-service-menu.htmlthen when inside the service menu, see if u can find a way of adjusting the colours, maybe at the worst case if u cant adjust individual R,G,B levels, u could adjust the 'hue' which would affect the overall colours (eg. make everything more/less green, or more/less blue, or more/less red, etc
ps. before adjusting anything, u should have a pen and paper next to you and before u change any value in the service menu; write down the default value u are changing, so u dont forget and can set it back to its default (it's easy to get lost and make changes and then realise you cant get your tv back to its default settings, and end up with a mess

)