Suppose you are the typical starving-to-death local dive shop. You want to sell wetsuits. You need 5? sizes times two sexes. XS, S, M, L, XL or something like that. So you need to stock ten wetsuits just to cover one color.
Now add red, blue, yellow, lime green, pink...oops, you need 5x the inventory, and some of it doesn't sell so often, so maybe it has to be priced even higher to accommodate that. And sooner or later, you run out of money because those cheap divers won't pay what you need to cover inventory now.
Same thing for the makers. Stocking five or six colors of neoprene and running shifts on the line for different colors, all adds to costs. Forget everything else they tell you. Colors were available, and ARE available, but you'll have to go to custom orders, custom suits, or bigger shops to get them.
Same thing with BC's, which used to come in bright colors FOR SAFETY.
Tell the wifey to try Halston and Chanel first.(G)