I am afraid I do not know a ton about the codes they use to mix paint. I am assuming they are the same no matter what store you go to and brand you buy, but I am not sure. All these codes come from Behr paint mixed at Home Depot.
Don't get hand-cramps from writing all of your thank-you notes! Why not convert your handwriting into a font?! It costs about $10, but I'm filing this away for future reference... This would be really cool! :)