Colour has deep meaning on human psychology and it affects overall mood of a person.Psychology of colour is it relates to influence target audience and it is one of the most interesting — and most controversial — aspects of marketing.E.g. yellow is considered as happiest colour in colour spectrum. It’s important to understand that one’s environment—and especially cultural perception—plays a strong role in saying color appropriateness for gender, which in turn can influence individual choices.Research have proved that individual choices,experiences,upbringing often helps in deciding colour selection .In the same way colour yellow often evoke such hyper sensitive emotions in human beings.In one of study based on effect of colour on marketing ,researchers found that up to 90% of impulsive judgments made about products can be based on color alone, depending on the product.
 Studies have shown that there are certain psychological changes happens in human body when exposed to certain colours.Colours can increase appetite,can even depress or excites or even stimulate or creates feeling of warmth or coolness.There are 4 psychological colours which affects individuals

Red: -Effects human the body

Blue: – Effects the human mind

Yellow: – Increases self confidence

Green:-Balances overall Mind, body and human emotions

Blue:-As the colour of ocean, sea and rivers are also blue it denotes feelings of constancy in human lives. Represents feeling of trust,continuity and efficiency.In companies it’s used for brainstorming sessions, and conferences. Also researches have proved that employees are more productive in blue room .Even mosquito are more attracted towards blue.

Red: -It’s considered as highest arc in rainbow and longest light wavelength.Increases enthusiasm, confidences, and actions and prevent from fears and anxiety, boosts heart rate, increases brain level activity. Also its important for people who works late in night,stimulates feeling of passion,optimism,adventure in them.

Yellow:-Stimulate energy,increases optimism,increases peoples temper.Reflects happiness,shades of golden yellow shows feeling of positivity and considered as happiest colour in the spectrum E.gUS people paints pencil with yellow colour.Encourages communication,stimulates mental process and activates memory.It also considered as best for bathrooms and kitchens

Green:-Helps in increasing creativity, promotes harmony and balance,reduces anxiety and eye strain.Best for brainstorming and spaces where computers are used. Among colour spectrum it’s considered as one of the most visible to human eye than any other colour .Considered as best for interior designing .Relaxes mentally,offers sense of harmony and self-control.Represent nature,wealth and wealth