Needing advice: Black Static and dynamic rope middle markers

Hey everyone! A buddy and I split 200m of static rope and cut it in half. I’m wanting to make a mark in the middle of the rope but am not sure what the best way to go about it would be? The rope is black so most of the solutions I’ve seen online won’t work as well as I would hope.  I’ve seen tape and buying specialty markers as to not damage the rope. The tape idea could work for a short time but It will eventually come undone as it moves through metal and across Rock. And I’m sure we wouldn’t be able to see the dye.

Has anyone done anything that has worked well for them? Open to all ideas.

With that being said I also have a rope that has been used pretty much exclusively for top rope and the middle marks have become faded. I was going to mark it with a dye or specialty marker but also wanted to know if anyone has done anything that worked really well for them. I’m assuming marking dynamic and static would be different. 

Sharpie

I use Beal's rope marker and it works well.

For the black rope, sew some white dental floss into the sheath at the middle.

Whipping with dental floss, nylon twine, or that red/white cotton twine from an Italian bakery.  Or white tape of your choice.

​https://www.mountainproject.com/forum/topic/118108361/adding-a-middle-mark-to-a-dark-rope#ForumMessage-118108921​