Anyone exacting enough to coordinate their clothes with their candy should know there is a Japanese solution. I've always thought dark chocolate was pretty...well, dark, but the Meiji brand has it beat with "Black Chocolate." (It's not quite black, but the packaging is good enough.) My other favorite is Black Black gum by Lotte, which is so black they named it twice. There's something quite pleasurable about unsheathing a stick of black gum before you push it past parted red lips.
No trip to Tokyo is necessary, they sell these things at Jas Mart in NYC.