Waterbug,
Being you are in FLORIDA, white is your best option because of fading. If you have to have a color, cover it with topgun, Sunbrella material or store the boat in a closed area. I had a few yellow boats and they too faded in the blistering Florida sun. Red will turn to pink and I don't know what color green will look like after a while. Grey will begin to turn a whiteish-grey color.
Bob <img src="http://www.catsailor.com/forums/images/graemlins/wink.gif" alt="" />

"The election is over, the talking is done, Your party lost, my party won. So let us be friends, let arguments pass, I’ll hug my elephant, you kiss you’re a $$.”
Liberalism = A brain eating amoeba & a failed political ideology of the 20th century!