Neutral shades and cool colors such as blue, gray, green, and lavender are more conducive to sleep. They are medically proven to lower blood pressure and cool you down for a good night’s sleep. They also have a relaxing effect on your mood. Research shows that colours like red induce stress and are not suitable for the bedroom. However, if you don’t want to part with these shades, you can imbue them as accents on your pillows, and artwork.