The standard latex colours available at sex-shops are black, red and yellowish-transparent. If you go to a “fetish specialist” you will have a choice of 40-50. Personally I prefer royal blue, transparent blue, pearl sheen pewter, transparent skin, transparent cosmetic, transparent grey…
Yeah, many… But the most popular was, is and will be – shiny black. And then red. Black is more practical. Red is very bright and usually associated with sex and aggression. And together they attract attention like a powerful magnet.
Update: found another photo from the same series.