I like both the Tans and the Urban grays. Dan's comments in the Blade post sounded like there might be more if he received favorable feedback, but for whatever reason, it hasn't happened so far. If the blades have a logo, I think that the contrast is best against Black, which may be why we haven't seen other colors. While Scrap Yard hasn't released any Olive knives, that's been my favorite color in the last few Swamp Rats.