Nocturne for your screen inversion needs

A screen inversion tool – switch your colors to Night Mode”┬áNocturne is a small simple app that resides in your OS X tool bar that will invert the colors of you tool bar and screen, which is good for late night computer usage without burning your eyes. If you like customizing how your computer interface looks, it’s worth checking out.

Basically, it easily turns this:

to this.

 

Nocturne