I MOSTLY color-coordinate!
Paula is yellow, like her collar. She is like lemon custard, smooth and sweet but with a piquant tang.
Boo is red, like her collar. She is a real live-wire and the vibrant red suits her. If I could find a flashing neon collar, it might suit her better!
Pup's collar is royal blue, but I think purple would suit her better. It's a color of royalty, which Pup thinks she is, plus it's kinda feminine but not as girly as pink.
Buddy's collar is teal, because they didn't have a blue collar available when we adopted him. The color suits him, and goes well with the tan in his coat, but I think navy blue would suit him better. Navy is a nice strong masculine color, and yet it's dark, and would go with Buddy's broodiness.
The greyhounds all have coats, harnesses, and leashes that match their collars. Poor pup, though! Her collar is royal blue, her chain leash is metal with a royal blue handle, her training leash is Buddy's old teal leash, her harness is yellow because we got it for free, and her gentle leader is black. She looks so mismatched when we take her to obedience classes!