A Master photographer must know the way colors interact with the audiences eyes. Any adjustment in the intensity of light brings about a shift in color and how it is perceived. If the position or angle of light changes, whether the source is reflected or direct, the colors in the scene will change. The master photographer will recognize these changes to improve the work and subject matter.
Color in an image can help to generate a "feeling" in a photograph and an emotional response ranging from fear, to love, to anger or happiness. An image that has a blue cast is representative of a sad, gloomy, or somber mood, while red is perceived as causing an angry, antagonized, or irritable mood.
<a href="http://fineartamerica.com/art/photographs/green/all" style="font: 10pt arial; text-decoration: underline;">green photos</a>