A study in Britain found that the color you paint your bedroom can determine how many hours of sleep you get. Yep, really!
To quote the study:
"In a survey of over 2,000 British homes it was found that the colors blue, yellow, and green helped sleepers get the most hours of sleep with blue averaging 7 hours 52 minutes, yellow at 7 hours 40 minutes, and green at 7 hours 36 minutes.
These colors are often associated with calmness and relaxation and can help put your mind at ease as you are trying to rest.
At the other end of the spectrum, colors such as purple, brown, and grey can potentially ruin the amount of sleep you get. Average hours for these colors are 6 hours 12 minutes for grey, 6 hours 5 minutes for brown, and 5 hours 56 minutes for purple."
Theories suggest that purple is an artistic color that stimulates the creative mind, and browns and greys are often associated with dreariness and depression.
Now, while no-one mentioned black, we can assume that's only good for chalkboards, and bat-caves.
Sleep well now!