Welcome to ZA, Emdr! We actually already have a place for you to Introduce yourself, in this same section, so why don't you say hello over there?
As to your request, there are already black variants for both the Tiger and the Lion, and the lion already has a white version. Unfortunately they cannot be applied to babies; this is so far an impossibility for our amazing coders, and the tiger variants do not work once MM2 is installed. You can find all of these in Downloads under ZT2 Animals > Variants and Reskins