This is an in depth article on lure color.

http://www.bigfishtackle.com/articles/fishing/freshwater/freshwater38.html

another good place to look is the ontario website that A.J. has listed on the left, in the tips section there is a whole article on color variations and how depths affect color's I thought it was really interesting and imformative Take Care God Bless and Tight Lines LOL Donkey Dave From up North The Backwards Frenchman