HOT, black reflects, BUT I wouldn't think your deck would be black (carpet or vinyl). So its just a personal preference and its all YOURS Me I love blue so that's the color of the carpet on the pontoon boat and the hull color of the bass boat (gray vinyl floor LOVE it). I'll never do carpet again.
My 2nd black boat. They are hot, they show every scratch, they are hard to keep clean, you have to be very pro active on your gel care. Pro's: They are to me the sharpest looking rig and you become almost invisible from a distance on the water and best of all it matches my truck!!
I've never had black, but I've had white and unless the price is right I won't do that again. The hull wasn't bad the inside showed every black mark from rod and reel handles and anything else that touched the fiberglass.
I LOVE black for all my rides. Truck, car, motorcycle, etc. However like @AirForce said, they do get HOT! So hot my latest car I went with a dark charcoal gray - which is also easier to keep looking clean.
However for boats, I seem to go almost the opposite extreme on the color wheel. I'm drawn to whites, blues, reds, yellows, greens, etc.