I am glad that none of the dyes are anything like the awful neon colors. At least in the guide, they look quite natural. However, at least with the pictures of the breastplates in the guide, since none of them really stand out as crazy colors, well, none of them really stand out as crazy colors. I don't see that there's likely to be a big market for the rarer ones in the same way as you look at a rare fire plant or cloak and say OMG that's different.
On an unrelated thoughts, are the venom vials available anywhere from vendors or are they purely a crafted item? (Still working alchemy.)