This is not true. There has been no research about room color and mental illnesses.
This probably stems from the story "The Yellow Wallpaper," about a woman who is cooped up in an old nursery in a house at the shore. It is not the wallpaper (or its color) that causes her to become mentally disturbed but rather the fact that she is kept in the room like a prisoner.
Yellow teeth is not proven to cause cancer. People should be smart however, and take care of their teeth and gums.
Red and yellow because these colors have been scientifically proven to make people hungrier. (ex. McDonalds)
Yellow dye number 5 is considered dangerous for human consumption. It has been proven that yellow dye number 5 is carcinogenic.
They can be, but not likely.
You would likely have a shade of orange. Pink is light red, orange is red and yellow, and you add more yellow. So it would likely be a medium to somewhat light orange to orange-yellow.
This yellow discharge is likely a bacterial infection; you need to see a doctor.
Depends if the yellow people have some sort of skin disease, which is transferable then it is possible.
it depends on the rarity and which looks more exotic, but most likely the yellow one.
No yellow is an adjective. It describes something. It most likely isn't an actual object.
there is no official meaning of Yellow, but more than likely neutral is either yellow or gray, but sometimes Yellow stands for one side of a conflict.
overwatering, most likely.
More than likely from mosquitoes