I like to use darker colors in deep water.
Green Pumpkin, Dark Green Melons with Black Flake, Black with Red Flake.
Remember there is not much light to reflect off your flake colors at 30 feet so I don't think it is as important as a solid silohuette.
I don't consider 10-15 ft to be deep.
My most productive tube last year was a 5" St. Clair Gobie tube from:
www.combat-bassfishing.com/new-tube-baits.htm