you are asking which colors are easiest to keep clean, and show scratches least.
From what I read, light colors show less scratching. From my experience, materials matter more than color when cleaning. Gelcoat covered boats clean up nicely. Plastic boats seem to depend on surface texture and possibly the type of plastic. A bit of Softscrub and some elbow grease get them looking fine. A coat of Armorall or 303 will always help.
Keep everything out of the sun as much as possible. Fading from UV is more than cosmetic.
Get what pleases you, or if buying used as I do, get the hull that pleases you, color be damned. Scratches are the sign of a well used boat.
Reflective Hull Decals
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