React 4 Color Picker
Demo: http://codepen.io/aush/pen/dGQeaW
The problem: properties of the td element cannot be transitioned, so in order to archive the desired effect, something different had to be done.
This module is more like a demonstration of one of the possible ways to implements this functionality, though, you're free to use this component however you want if you like it.
npm install --save react-center
Check out react-stack and awesome react css modules.