No, I usually buy all black basses, though I do have one in sunburst finish, one of my least favorite finishes, but the only finish that particular model comes in, and my first ever bass, which I still own, is white, cause back then I couldn't care less about color or visual design.
I would love a dark green, a blood red, and a deep metallic purple, bass though.
I guess this with the visual mods I've done to it comes closest to rainbow colored (at least green and red, and some purple in the background as well):
Edit!!!: Oh, wait forgot that I actually long ago decorated that white bass I mentioned with star stickers in red, blue and green metallic colors, a green tape stripe, and a red tone knob (and that it actually still looks like this):
And then there is this one I made (with some help from an AI program that allows for mixing characteristics from one image with a second image, and then PhotoShop):