© The Turkish Online Journal of Educational Technology.In this study, psychologists’, interior architects’, designers’, doctors’ and advertisement writers’ studies and thoughts about the impact of interior design and colors were searched. For this purpose, studies national and international studies related to colors were examined and psychological and physiological impacts of colors were investigated. The most important goal of interior design is to create physical environments that address people’s physical, mental, emotional and social requirements. While creating these environments, it is crucial that people are happy, peaceful, comfortable and healthy when using them. Interior art aims at achieving visual effects and functionality. In this regard, the expectation is to design places that people can feel themselves in psychological well-being. Besides the interior art, which has an important effect on human psychology, the impact of colors on emotions has attracted scientists’ attention for years. For this purpose, studies have been conducted but to a limited extent. In this study, the aim was to collect the results of related studies in the area conducted by scientists in various professional fields. Thus, it was planned to present to the reader the places that people live in more happily, peacefully and healthy; and the reasons why they use certain colours at home and in business by providing examples.