Here is a link about Black Bears and their vision.
They do see in color, but I think the smell of food is what will really attract them to a campsite.
Read article over the weekend that says to refrain from bright colored tents in bear country as it draws attention and bears are curious. I know we are in hammocks but would think the same would hold true for us. Personally I go with muted colors outside the hammock and a splash of color for the TQ. I'm sure there are many different views on this subject with only Smokey and Yogi knowing the truth...
Good posts all. Food for thought. Heh heh heh.
Me & my brightly colored hammock gonna hit the trail in a couple months. Cant wait. Getting excited. Want to do the white mountains, but will probably start with the Catskills cause they're closer.