Interesting you should ask that. I have experimented with a few ways to mark it up black tape as the black grip tape absorbs alot of spray paint and such. White tape does better but I wanted the black tape look for a weekend or two. I have found that cheap nail polish does an ok job of showing up on the black and is pretty durable.
Here you can see black and white grip tape that I used basic spray paint on and a white grip tape that I used a sharpie on.
Now I applied them to my railing to show how easy the stuff conforms to surface areas and you can also see how regular spray paint hides pretty well in the black tape, but on the white the blue and brown spray paint is clearly visible.
Another concern people may have is how does the tape stain? Well I don't have any paint with fill other than white so here is a good example for you all.
And let it sit and then a few wipes.
Almost not even visible! You can get really creative with the stuff