Color changing snail?

[jackiomy]

I put my Ivory, 2 Blues, 4 Golds, and a wild type in my 40 gallon. I found the littlest Gold's shell empty a couple of weeks ago and today I found the little wild's shell empty! But the weirdest thing is that it looks like I have 4 Golds and 2 Blues. I can't find the big Ivory at all. One of the Golds is really light gold color though. Could the color have changed on my Ivory?

 

[dixienut]

yes, the ivory i got was the whitest one in a tank with yellow looking ones but were still white, the have a yellow cast to them...after my ivory grew and had a few clutches she is a tiny bit more yelowish now in places

or perhaps your ivory was a pale gold that matured to the correct color,..