I would keep myself from commenting on your attitude for reacting on color changes in ur furkid.
Anyway, unless your cat has been rolling in mud and you didn't bathe him/her, which results the color change - please do expect a cat's fur color to change as they mature. for example see my same cat when he was 2 mths old
And him 1++ year later.
So they do change. It's in their genetics.
Cream is gorgeous in my opinion. ^_^ its quite rare. any pics?