This is based on scientific studies and does not by any means apply to every person.
Blue - The color blue is most often associated with feelings of calm and relaxation. This is most likely due to things like the ocean and sky being colored blue. Many institutions use blue hues of paint on their walls to help maintain a calm environment. Masculinity is often represented by the color blue and is usually used to clothe male babies.
Pink - Pink often represents femininity and physical youth. Although blue is typically worn by both genders, pink is usually neglected in the male wardrobe. The color is also interpreted as representing the female pubescent sexuality and romance.
Red - Red is most commonly associated with sexuality, although feelings of power are also indicated, most likely due to blood having the color red. Red is a color that attracts a lot of attention and bright red cars are statistically involved in the most vehicular accidents. Red is sometimes used to represent anger and people that are angry are described as "seeing red".
Black - The color black is commonly associated with death and the unknown. Humans instinctually fear darkness and this fear can be induced by dark colors. Mourners usually wear black to represent their feeling of loss for the deceased. Black is often worn in evening clothes and many attribute it to a sense of romantic mystery. Black is used to represent evil and the cruel are said to be "black of heart".
White - White represents innocence and good. It is worn by brides in western-style weddings to represent the purity of the bride, which is lost after the wedding. In the christian religion, it is the color described as being worn by angels and other religious figures. White is also associated with light, which humans instinctually associate with safety.
Yellow - Yellow usually represents caution and happiness. Yellow is used in traffic lights to signal that the light is about to change to red. Many species of stinging insects have yellow components, as do other insects that are poisonous to eat.The sun is often shown with a yellowish color, indicating warmth and light.
Green - Green is a very natural earthy color and is seen throughout nature. People are said to be "seeing green" if they are jealous or greedy, most often because the color of paper money in the United States is green. It is also a sign of rebirth since cycles of life are seen throughout nature.