Color changing RavagerFollow

I have heard talk of this in the other ravager thread so I went to Petopia and looked up ravagers and found some that said Crawlervar1-5. Are those the color changers cause I like the look of the skitterer from Hellfire penn. and I can tame next level. If not is there is a reference page to color changing mobs or at least which ones do so I can pick the color that I like?
Thanks in advance.

thank you