3Day,
I wear shirts and hats that are tan or sage green in color so I can blend in better with the background that the fish sees from under the water.
However, most of the drift boats I ride in tend to be white in color or at least have a lot of white on them. Some have a lot of bright to medium blue as well. All the bottoms of the boats are white.
So, who knows.
But, then I fish in the larger rivers of WA and western MT. When fishing small pocket waters I know that the more you blend in and the less movement the fish can see means you will spook them less.
Larry ---sagefisher---