Greys come in almost every color/marking imaginable besides Tri's and Black and Tans.

A short list off the top of my head:
Red
Fawn
White
Black
Brindle
Black and white
Red and white
Fawn and white
Brindle and white
Any color + white
Blue (Greyhounds come in blue, not grey)
Dark brindle
Light brindle
White and ticked with various colors

I believe I even saw a chocolate Greyhound, but I can't seem to find a picture of one. It could have been a dark red, though.

Again, Pekes come in all colors. All that is required is black eye rims and lips and nose. My personal fave is a creamy off-white with a black muzzle and tips on the eyebrows:


Here's a good example of a parti-color: