Cool idea, I have read about it a few times before in some other threads. But it was the opposite since the OP mentioned always seeing a certain color in dreams (i think it was blue). His dreams were usually in hues of blue to whenever he notices the color blue irl, he'd RC. Of course he didn't mean looking for the colors, which is pretty common, rather, he'd RC when he'd actually notice it particularly, or remember it being related to his dreams. That way he wouldn't go around RCing like crazy x)