I got a Humbrol color chart from some website that I can't find now, and I saved it into a Word file. If anybody wants it, or can re-format it into something easier to read than one long list, email me and I'll send it to you.
I am pretty sure I have a Gunze/Sangyo chart around here someplace, but that's less legible. At least it gives you an idea of the colors called for in Hasegawa kits, among others. I mean, who knows what the heck color 'sail' is in my Datsun rally car?