I've been waiting for this one! My favorite color on 1:1 cars is brown, like Steve McQueen's Ferrari Lusso and Porsche's gorgeous brown on the 911's, and my default color for diecast always seems to be red thanks to all the Ferrari's, but its not my favorite. That honor goes to blue. I'm fascinated with all the different automotive shades of blue, Gulf blue, Grabber blue, Petty blue, LeMans blue, silvery blues, etc.. The richness and variety in shades is great. Hot Wheels has the very nice Spectraflame blue, the new Spectrafrost blues, some nice matte blues. I've got way too many to post at once, but I'll get started with a whole bunch for now.