Quite right - and, going to the other extreme, be wary if you are looking at Japanese speedos. LOL: many problems there between oriental and western physiques - as you might well see from recent posts here.
As for colors, bear in mind that retail shops will often carry a limited range
to avoid holding unsold stock for months. If you take a note of what brand(s) you have liked then it is worth using your internet search facility and you will undoubtedly find the manufacturers' full ranges in a variety of colors and patterns.