Rainbow colors are seven colors. Generally, seven colors (red, the bitter orange, yellow, green, blue, indigo, and purple) are arrangement of colors of the rainbow.
An opinion of scientist / Newton that seven colors of rainbow color is famous for the law of universal gravitations. It was thought that it was important that appearing related to "7" in the days of a thing of Newton. It may be said that it was prevalent. There were red, yellow, green, blue, the different colors of the violet as basics of the colors of the those days, but seems to have wanted to do it with seven colors that Newton watched an obi of the light of the rainbow and never added +2 colors. Thus, in addition, I did the indigo plant of the color of the plant dye to seven colors between "bigarade", blue and violets from the color of the orange of the fruit between red and yellow and decided the color of the rainbow with seven colors. This is handed down to Japan and spreads out in Japanese school education after the Meiji era and reaches it at the present.
World rainbow color circumstances
The rainbow color is five colors, and it is six colors, and it is it in the numerical way of thinking of various rainbow color in the world by and there are three colors, the four-colored country country and area or times. I cannot distinguish the color of the rainbow by the change of the color that continued tight scientifically. Therefore, there is numerical how to catch colors of various rainbows. It is it with seven colors and the number of the colors of much rainbow color from height of the color cognition which can judge Japanese many colors with seven colors having been taken in for school education in the case of Japan.
The equal thing order of the color of the rainbow
The rainbow color is decided to undergo the order of the spectrum of the color. I become the red yellowish orange copper green rust indigo plant purple from the top, and it is it in this turn even if I watch any rainbow. When I do the color of the rainbow color, let's do it in order of this color.
A story of the knowledge of the color to make a living happy