Hi DaddyHulk – Great nick btw 😀

Ok so I pulled down some info from a koi book I had kicking around Tamadachi M (1990). “Koi varieties”. The Cult of the Koi. This is one damn heavy book to read but gives you a full inside and out of everything about Japanese Koi also their colours.

To save you the hassle here is a quick sumamry from it;

Taisho Sanshoku – Speckled Koi – white with orange and black spots.

Yamabuki – Very pale yellow koi.

Platina – Pure white koi

Tosai Shiro-Utsuri – These are white and black/blue speckled.

Tanchō – Red patch on head

Asagi – Light blue top and red bottom colouring

Ōgon – Single colour koi but metallic scales (thick scales)

You can also get them in green etc – pretty much any colour as it depends on the breed.
The main thing to remember is the Koi is a form of carp and the Japanese breeds are often crossed with other carp eg German to get a change in scale colour or even no scales at all.

Hope it helps
Matthew