Thanks, Alex. Interesting info, though I don't know if I will be able to stand looking at these for 10 years, LOL. This is my retirement house and so I have to decide whether I want to spend the rest of my life (literally) looking at that color and thinking "gawd I hate this" or bite the financial bullet (more like a torpedo) and have it ripped out and redone in grey.
Yesterday was the first time I saw the pavers wet, and nearly had a coronary because they literally turned to fire engine red and black. Thought I was going to upchuck.
This page of Nicolock's website claims the color is "guaranteed not to fade" which in my situation is not good news -- but maybe they were not yet using the same (Paver Shield) process 10 years ago?
https://nicolock.com/paver-shield/