wire color?

[Adam]

I ran out of wire, of all things, the other day when I was working on the Westinghouse. And instead of my usual of buying a single big roll of about 18ga. copper stranded, so I can just use it for everything from my TV to my car, I went and got different color solid wire to match the different colors in the set. Now I know that red and orange always appear to be from different parts of the power supply in the sets I've worked on. But I was wondering if there is consistency between different sets and the other wire colors, blue, white, brown, yellow, etc. I know I could figure this out if I took a couple sets apart at once and compared them, but I'm being lazy. I also thought I might not be the only one wondering about this.