When I was purchasing koi last fall, I had some help from a couple of the ponders on here, giving me pointers on ones I bought or was thinking of buying. The comments ranged from "that one will probably change quite a lot in the first couple of years" to "wonder if that one will stay that color". In other words, the ones I was choosing were colors that would likely move and change, although not completely different. So far, the only one I lost was one that had jumped out twice in the basement, and saved both times, but on the day that I was ready to move them, it was dead. All the others have thrived. I do see some of the colors changing, but for the most part, they have either remained as they were, or the one that I bought as a Platinum Ogon (solid white) Matsuba (that was the problem) has changed to the matsuba coloration being more prominent, and now looks more black than white. One that was all white with a yellow head they said the yellow would likely fade, which it has, but now it's a beautiful white butterfly, with a very pale yellow head, so that one takes the place of the white one purchased turned dark. A yellow Gin Rin is still beautiful, very yellow, and another yellow and white Gin Rin also has kept its coloring, which is a surprise, since yellow is usually not permanent, or changes to either darker or lighter.
Here is the yellow and white that has kept it's color nicely, Gin Rin.

On the top of the next photo, you will see the white with yellow head, yellow and white GR, and yellow GR. Also, my favorite (I know, not supposed to favorite any of my fish, they go missing ...) of that purchase was the tri colored one on the left - it was labeled Gin Rin Taisho Sanke. The beautiful red and white (with underlying black spots) was purchased last summer from RS Fish in Indianapolis, IN area. The gray looking fish in the foreground used to have red, but that coloring left already last year, keeping just a tiny spot or two, but has pretty scales.

In this next pic, the orange and black (top left) orange and white, solid orange with black scales on top (female) and Asagi (white/blue with red belly) were all purchased form RS Fish. The Taisho is in the pic, as is the white will yellow head "Angel". The one on the left just above Angel was purchased as a "Yamatonishiki Gin Rin". Not as shiny as the others, but loved the tri colors.

Lucy, the "red head" is pretty in this pic, as well as the Yamato is showing more shininess. There is also a Showa on the left side, looks mostly black, that has definitely changed colors from when it was purchased. It's also Gin Rin, regular fin. They yellow and white GR is easy to see it's GR scales, too. Taisho is at the bottom.

This last pic is really blurry, but got the orange and white butterfly GR in it. Can you tell I was focusing on butterfly and Gin Rin? LOL
