I just came across an article about Ford who think that the colour of the lighting in a car interior can affect driving alertness, giving drivers enhanced attention span, improving safety.
They say that a blue colour is best for alertness. I was intrigued by the statement:
The brain does not see color. What we call color of light is actually a form of electromagnetic energy with different wavelengths.
Seems to be by someone who thinks that colour is perceptual rather than physics – see my view on this.
They also say:
Certain levels or combinations of light trigger enzymes in the brain, which cause emotional responses within the body – states we recognize as stress, calmness or happiness – and can influence everything from your blood pressure to your buying decisions.