That's a hard question because Honda has used a lot of different shades of red for their off-road machines. Here's a pic of what I'm talking about though. It's a 1986 ATC 250R.
http://members.cox.net/rebuilt250r/images/011.jpg
This particular red lacks the orangish look some of their reds had. It's basically just a true red. I think they call it "passion red" but I'm not 100% certain of that.
So does anyone have a suggestion for what will match this as closely as possible?