They keep the real life breeds to the breed standards for colors. So sadly the three colors we have for russians are all that are standard to their breed so we won't see lilacs or seals ect. because while standard to other breeds they are not standard to the russians. There is a thread asking for more fantasy colors like the Pink & White Chateau (which Chateau is a made up breed so could have fantasy colors) The only other exception to the fantasy colors is the Fancie Cats but as we can't breed their furs it sorta doesn't count in my mind.
Here is a link to the thread where we ask for more colors.
http://kittycats.biz/forum/showthread.php?tid=7608
KittyCatS lover and LazyCats auctioneer. 
