Color is supposed to have an effect on people but I don't know why it's important to have a "calming" color in the bedroom if your eyes are closed when you sleep? I'm not in my bedroom except to go to sleep.
That makes sense @Lämmchen ! Some people have TVs in their bedroom so are in there often. I do some studying at night. Other than that, I don't pay attention to the color. I actually had to go in there to even remember what color it was LOL The walls are beige.
My bedroom is blue in color , maybe it is so because of the curtain color that is blue. My lucky coin is also blue to be honest , so I prefer blue color everywhere in the house.