Eye Color change?

As long as the eye colour hasn't been noticed by other characters / really mentioned IC and won't affect someone else's continuity, it shouldn't hurt anything for you to change it if you want to. However, you shouldn't feel obligated to change how your existing character looks just because they resemble another character, especially when it's a simple design like red wolf with yellow eyes. There are a finite number of simple designs, some characters are bound to look similar eventually, and I think it can be kind of fun for a character to be mistaken for another IC since that happens IRL all the time!