Remember the experiment I did the other day? The customer was very happy with the result, so I went ahead and spun a batch of yarn and dyed it in the same way. My 'black' is more charcoal than true black, but I hope it'll do the trick.
I also had an order for a zebra hooded towel, more black and white. I made some changes from the original zebra I made. I made the snout mostly white with some black added, rather than all black, and made the mane out of felt instead of yarn. The stripes are made of felt, not fabric, which meant I could use a straight stitch instead of zig zag, which is quicker and easier. Probably neater too.