Quote Originally Posted by eskil View Post
red, orange, yellow, green, blue, indigo and violet.
Any ideas?
Red: Rinse water from Kodak TMax, post development
Yellow: stop bath
(the rest are prerinse colors)
Green: Agfa?
Blue: Ilford?
Indigo: More concentrated than above
Violet: Same.

And +1 on hand coloring. Just color the water coming out of the tank, let the rest remain b&w.
Oh, and don't forget the various colors from toning.