Color can be approached from different perspectives and disciplines such as, biology, theory, technology, and psychology. This thesis discusses color, from the stand point of interior spaces, which to some extent involves most of these disciplines. The aim of this study is to review the research on environmental color. It will summarize what is empirically known about our responses to color, how, if at all, color ) influences the perception of an interior, how it is effected under different light sources or if it is effected from each other. The effects of light on color will try to be verified by using a 'color and light simulator'.