If you want a brightly colored bottom paint, use one that contains zinc, ECONEA® (tralopyril), or cuprous thiocyanate (white copper, as opposed to dark cuprous oxide) for the biocide. Paints containing these biocides include Pettit Vivid, Pettit Ultima ECO, Pettit Hydrocoat ECO, TotalBoat Krypton, Sea Hawk Smart Solution, Interlux Pacifica Plus, Interlux Micron CF, and Interlux Trilux 33.