Whoa, I had no idea you could do that with jQuery. I'll try not to abuse it in projects. .___.
Anyhow! I had a quick look and it appears that jQuery Color, which allows animation of colours, is a plugin and you just don't have it included (see here). I tested with your code simply by including the minified version of 2.1.2 and it seems to have fixed the problem you mentioned.
I tested on both Firefox and Chrome and didn't have any issues with a new window opening (I'm not sure if it's a user setting, too). Would you happen to have changed anything already by the time I looked at it?
I hope that helps!