Color Psychology

Studies show that people's perception of color can change their moods and emotions. For example, the color red can introduce feelings or warmth or excitement. Green is calming and may relieve stress. It is also said that green can improve reading ability. Brown brings about feelings of warmth, comfort, and security. Brown can make people feel strength and reliability, or also sadness and isolation. In this article, it also discusses how certain colors and the feelings that match them relates to language and phrases involved with those colors. For example, for the color red people use the phrases "seeing red," or "red hot," which are both terms of excitement or descriptive of strong emotions.

http://psychology.about.com/od/sensationandperception/a/colorpsych.htm