I have horse makeup for greys and blacks... and I haven't owned a grey in nearly 3 years, nor do I have the intention of owning one again. I was given the makeup 2-ish years ago. I had a buckskin and a bay. I now have a chestnut.
As far as I'm concerned, nobody can have too many halters, leads, or rugs. But that might just be because my filly is a rug wrecker and sets back when tied.
I have millions of bits that I don't use, that have been used once or even not at all. Rugs that don't fit my horse, jumping boots [she's 3... not going to jump for a while yet], I nearly bought a false tail just didn't have the $200 it would have cost... I am shocking!