Greyscale.
It doesn't intrude or shout in your face or try to distract you. It's simply there and doesn't judge you. Greyscale isn't concerned with trying to make friends with you, its just there to get the job done and let you focus on what matters. You can call it dull but greyscale won't mind, won't care, it doesn't take sides. Greyscale understand that light and dark are two sides of the same coin.
...what do you mean the colour scheme isn't a person with feelings? <_<;