Hi,

For the colors it's on the kernel side so you can try ElementalX, Faux123 or Franco kernels. They also have sound improvements, tunables via apps, like the colour control. Just take a look in the OP of the kernel threads.

There is also this mod for the sound: http://forum.xda-developers.com/show....php?t=2532788, I use it and it works great for me.