Koi Colors

The basic list of color-associated words below will help you to begin to
understand how Koi names are built up.

Ai Blue or Indigo blue  
Aka Red (as a base color over the body)  
Beni Orange-red (usually as the base color over the body)  
Boke Blurred or faded effect to pattern 
Cha Brown  
Gin Silver (metallic)  
Hi Red (markings on the body of the Koi)  
Karasu Black (as a base color, literally 'crow')  
Ki Yellow  
Kin Gold (metallic)  
Midori Green  
Muji Single colored or plain  
Nezu / nezumi Grey (literally 'mouse')  
Orenji Orange  
Shiro White  
Sora Grey  
Sumi Black (markings on the body of the Koi)  
Yamabuki Yellow (literally, a Japonica bush with pale yellow flowers)