That is good to know, because what I found was this, but it is on line and so might not be acurate when I was looking for Chester's coloring. And the AKC page at something differenct, wish they could all be consistant!
From the AKC Cocker Spaniel Breed Standard
Two or more solid, well broken colors, one of which must be white; black and white, red and white (the red may range from lightest cream to darkest red), brown and white, and roans, to include any such color combination with tan points. It is preferable (NOT required) that the tan markings be located in the same pattern as for the tan points in the Black and ASCOB varieties. Roans are classified as parti-colors and may be of any of the usual roaning patterns. Primary color which is ninety percent (90%) or more shall disqualify.
Brown & White
Red & White
Black & White
Brown, White & Tan
Buff & White
Black, White & Tan
The colors listed in the AKC Cocker Spaniel breed standard are the only acceptable colors or combination of colors for conformation showing in the United States. The breed standard specifically states that "Any other colors or combination of colors to disqualify." However, despite the limited number of colors listed as acceptable by the American Spaniel Club, there are a number of additional colors/markings/patterns that are known to exist within this breed.