Colour have psychological effect.
It triggers neurological response, cause hypothalamus to release hormones.
Warm, bright colour: e.g., red or pink, releases dopamine (feel-good hormone), helps to improve our mood, heighten attention span and boost sex drive.
Cool blues, have been linked to the release of oxytocin (love hormone), making people feel of calm, being loved, enhance uterine contraction in childbirth and milk transfer in postpartum period.