I don't ever cut any roots! A Kiwi Full Monty is a blue Striptease. Yours must have reverted or sported to all green.

-Babka

hosta emerge in spring.. on stored energy .....plants store energy for next spring in the roots ... this time of year ....

DO NOT CUT THEM OFF.... if it can be avoided ... especially when you have so few ..... relatively speaking .... [when moving a large plant.. you do the best you can]

i would not expect it to regain lost coloration .... ken

A solid green out of the Striptease line is, in theory, Hyacinthina-ish. If you want a Hyacinthina, buy a Hyacinthina. But if you want to keep this, don't cut roots.