Notice of RetractionHarmonious color combination rules based on natural color system

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

Recently, as the economy developed to provide abundant lifestyle, the importance of design is becoming more and more critical. However, even though color is important, users are feeling difficulty in choosing and using colors since learning about colors requires a lot of time to understand the basics as well as go through training. Thus, in this paper, we propose the rules to systematize the basic theories regarding color harmony. For this purpose, we classify the Ostwald color harmony theory into five categories according to the characteristics of the color pyramid based on the NCS. Our proposed Classification Rules for Binary color Combination in NCS will further provide the foundation for various color combinations and will be merged with Color Recommendation System based on Preference in the near future.