Solids

Black and red are called "full colors" in the cat fancy. When a cat inherits the "dilute" genes, black becomes blue and red becomes cream. Even solid color cats that are the same color can look different since the shade of a color can vary. Except for white, it is not unusual for a solid color cat to have a faint suggestion of tabby markings especially when they are kittens. These are called "ghost markings". These ghost markings are seen most often on reds and creams.

Black Cats Blue cats
Black Blue
Black Cat Blue Cat
Black Blue
Red Solid Cat Cream Solid Cat
Red Cream
Chocolate Cat White Solid Cat
Chocolate White