There are four accepted colors of the Cavalier King Charles Spaniel: Blenheim, Tri Color, Ruby, Black & Tan. Unfortunately, like so many other breeds, there is an influx of other non-standard colors. Much like you need a blueprint to build a house, preservation breeders use the breed standard like a road map to continually improve the health, temperament, and structure of the Cavalier.
The following article briefly explains why these colors are not, and will not be, accepted as part of the breed standard. The American Cavalier King Charles Spaniel Club (the breed parent club and keeper of the AKC breed standard in the U.S.) has taken a strong position against other colors.
The following article is shared from the September 2022 issue of The AKC Gazette with permission by the author, Dr. John Ioia.
Colors and the Cavalier King Charles Spaniel