These are tastefully done, in traditional shapes, so the unusual colors come across very well. I don't know how the chemistry of various random dyes might affect the flavor or hazards of a pipe, but I assume mostly they wouldn't, being applied to the outside of the bowl/shank. Now that you mention it, I consider myself open minded about colorful pipes. I do have two green stained pipes, and quite a few stems with at least some color, one in orange with swirls. But I have to admit, when I have run my eye over the whole collection on the racks, I am impressed with how much my pipes tend toward dark and neutral tones, a few orange and red tones, but a lot of black, dark brown, and neutrals with patina. So despite my fancying myself adventurous, I tend toward very traditional colors. One of my favorite carvers does some pipes with colored swirls on the briar, so I might consider one of those, just to expand my range in an intentional way.