I was looking at the coloration of my endli and seeing that at times it would display toward grey, then at times a darker brown especially after I added the black sand and it even was a light tan almost a pinkish hue to it. So color will vary depending on the fish and its mood and of course substrate.
Pkus substrate...we are obsessed with which variant will look different from this variant meanwhile there are too many factors that need to be accounted for... im starting to get on your side of the fence with this stuff... differenced yes but nothing major