I'm pretty sure that the jewels on the Ethereal Headdress and Ethereal Armor used to match before the recent image update.

As it stand now:

The gems both use the mutation color. The other parts of the mutations draw from color two.

In your example, M1 and M3 colors must be different which is why one's blue and one's red.

I checked the old image builder file and it uses the same colors - so I'm pretty sure it's correct.

Huh, I thought it had used 3 colors. Oh, well guess I was wrong. Thanks for looking at it. ^^