The electrochemical transference from eye to brain called Vision takes place the quickest in the presence of yellow. Yellow is the first colour a person distinguishes when he/she looks on any object. It is also the most complex colour for the brain to process.

• Yellow gets a quick though temporary response from a subject under stress.
• Yellow adds to stress by preparing a person for flight to fight.
• Yellow-painted rooms cause children to cry more often.
• Yellow surroundings cause allergies to flare more frequently.