I would avoid stimulating colours, for instance, large splashes of red and yellow or sharp contrasting colours such as black and white. This is because my bedroom should be a place of peace and tranquility rather than a stimulating environment.

I would advise against too much black as it will make me feel on the low side or even depressed. Similarly, I would try to avoid red because I will never have deep sleep or possibly have trouble falling asleep as it is not an easy bedroom colour to relax.