Which 锦鲤 breeds come in 黑色?

Club breed standards describe 黑色 for the 锦鲤.

锦鲤 color

黑色

Solid black pigment. In birds often with a green or purple sheen; on skin, legs, beak, comb and tongue the dark pigment some standards call for.

8 锦鲤 breeds list 黑色. It is in a club standard for 4 breeds.

Breed	JNPA
锦鲤三色（Sanke）	符合标准 (“black imprints (urushizumi)”)
锦鲤昭和（Showa）	符合标准 (“black body (black background)”)
锦鲤别甲（Bekko）	符合标准 (“black imprints shaped like spots”)
锦鲤写鲤	符合标准 (“black body (black background)”)

How 黑色 can appear or change over an animal's life.