So here's what fur patterns have come up in the lore so far:

- solid black (Stormlight)

- solid red (Sunshine)

- red with black ears and black socks (Tod)

- assorted brown shades

* fawn with black mask (Sunshine's original coat color before I decided to make her red)

* liver (The as-yet-unnamed asteroid miner from Table Manners)

* tawny (Crystal)

- solid white (Lightray Lacktail)

- white with biscuit pointing (Iris)

- Blue (Lodestar, Graypelt)

- Piebald/bicolor (Pascal)

Pascal's coat pattern looks like the stereotypical Holstein cow, which you sometimes see on pitbulls. The black spots are too large to be considered spotted like a Dalmatian, and there aren't enough of them to be considered harlequin. They're also small enough that he doesn't look like a border collie.

I'm not sure what constitutes “Blue”. It could be ticked black and white or it could be a solid diluted black. I'm imagining a solid smokey gray color for now.

Albinism likely also exists, and can be differentiated from white by the lack of pigment on the digits and palms. Since yinrih eyes don't depend on pigmented retina cells, albinism won't affect their vision.

Redpelts don't have white countershading, making them look slightly less vulpine.