Dogs Claws Changing Color?

8 year old Pit Mix, female, 50lbs, no serious health history, UTD on vaccines, Spayed, no clinical signs, have noticed for maybe a month on random claws but now it is on all her claws. Could have been longer where I just didn't notice.

Is the discoloring in all her claws a cause for concern? I am making a vet appointment for next week but am curious as to what the issue might be. I keep her claws trimmed and there hasn't been any obvious trauma that I've noticed.

Below is the link to 3/4 paws and one pic of her pads, she got tired of the foot pics, lol.

Bonus pictures of my sweet girl at the end!

https://imgur.com/gallery/doggo-claws-oefjp8T