UTSURI
Shiro Utsuri. This fish has white markings on a Sumi (black) background, giving more marbled effect than Shiro Bekko. 
Hi Utsuri.  This koi has a black background with red (Hi) markings.  The more solid the markings the better, although many have black spots caused by unstable Sumi.
Ki Utsuri. This are koi is the yellow counterpart of shiro and hi utsuri.  With yellow markings on black body.  The yellow generally extendts into the fins. 
Kin Ki Utsuri. This are Utsuri with spectacular metallic types.. 
Varieties