A sub-color that is derived from the combination of two main red and blue colors is from second-degree colors. It is difficult to make this color that represents the darkest colors of life because it always tends to be blue. The color versus yellow is in the “color rule” and creates fierce conflicts with it. Purple is a mysterious and stimulating color. In nature it can be seen in the first color (from above) in the rainbow, purple is very sensitive to white and changes with it. If it is dark, then it will be easy to do it. The wavelength of purple is 450-380.