Koi color
Blue
In coats and feathers the fanciers' blue: a dilution of black that looks slate grey, as in blue dogs, Russian Blue cats, blue rabbits and blue pigeons. In eyes and eggshells a true blue.
3 Koi breeds list Blue. It is in a club standard for 1 breed.
Breeds whose standards accept Blue
| Breed | JNPA |
|---|---|
| KoiAsagi | Standard (“blue, such as indigo or sky blue”) |