Which reminds me I haven't read it yet. Meanwhile, please excuse the drift, folks:
Well, let's call it conventional black, then. Seriously, my black sweatshirts and black T shirts, laid side by side, are not the same color, even though they're both undeniably "black". There are subtle things at work, here, and since I am not a dyer, they are beyond my ken. Did you know that some traditional Japanese dyers are obsessed with black, trying to get closer and closer to an ultimate saturation and depth? Of course it'll never be done, because someone will eventually dye something blacker yet. So while I've been known to appreciate a good dash of pedantry from time to time, here I must charge the black-has-no-shades camp with merely holding up a Platonic ideal that dyes us no flutes. If by "shades" we mean albedo, among other things like tints, I dare say the pedants will be unable to produce a physical sample to prove their case.
I can't believe I just ranted about this...