I'm surprised at that graph of band sales. 23% of watch sales were non-black Sport watches, which came with bands that were white, pink, blue, and green. But only the white band has sold 1% or more of the total bands (at 8%). That means the blue, pink, and green bands aren't selling very much at all.
Edit: This is complicated by the fact that the steel watch has versions sold with the white and black bands as well. But to not have any of the blue/pink/green break 1% is still not what one would expect and indicates they will be rarely seen.