It makes you wonder why North sea rescue boats are Dark blue and yellow sometimes. Why don't they make lifeboats black, or liferafts or the inside of lifejackets.
for your rib You got too make a choice (sounds like a TV ad) You want high Vis plus you want longevity of looks. Don't think the two go together in any colour way other than orange.
For long life and easy maintenance however white hull and dark blue or grey toobs in my experience are the easiest to keep up. Avoid yellow or Red