It’s pretty unobtrusive in place, but if you really wanted to black it out then use some fabric dye, let it dry , then spend a couple days wetting it down and blotting it.
The fabric dye marker only worked for a few days (I gave it 48 hours to dry first). Eventually, all the black rubbed out and the threads near my legs are red again.
Does fabric ink eventually stay with enough reapplication?
Also, I must say this seat feels amazing!
I just wish it looked as classy as the original with the ribs and the texture which complement the tank. There's something so pedestrian about a blank matte saddle on a bike like this, but that's just my taste. I might add straps to get that look back.