Standard colors of the Welsh corgi cardigan:

blue merle
In the photo: Keksband Beyond The Blue


tricolor, tan markings
In the photo: Astersland Fly Me To The Moon


tricolor, brindle markings
In the photo: Trafox Rebel Queen


red, white markings
In the photo: Zhacardi Zhak


brindle, white markings
In the photo: Astersland Unique Promises


sable, white markings
In the photo: Bright Cardiband Kapten Kind


non-standard color (possible cause: blue diluted, ee red, brown, excessive white color)