Purple cat

A Purple Cat is an item released on October 28, 2008, along with the release of the quest Swept Away. A Purple Cat can be obtained through the Purple Cat Miniquest, by taking a vial of Magic unguent to Wendy along with your Cat so that she dyes it purple.

A Purple cat is Members Only, and has no real differences from a regular cat, other than that it's purple.

A Purple cat still shows up as a regular Pet kitten or Pet cat, its colour is just different.