Very nice!

needs dark backgrounds for the menu / new tab

The animation is not smooth. After three seconds it loops back , and the cut is very noticeable. The colours are really balanced off another though, so too bad the cut is too distracting.

I really like the colors and the animation. However, the way the animation is looped can be a bit distracting. I think if it had a softer loop, like maybe a subtle fade, would make the animated play a bit smoother.