Three-color rainbow can draw many colors, including gamboge, orange yellow, khaki, ripe brown, pink rose, vermilion, dark red, purple red, Chu Shi red, pink blue, blue-green, gray blue, light gray blue, pink green, yellow-green, dark green, pink purple, brown and so on. So a tricolor rainbow can draw many colors, depending on the pigments and pigments used. Three rainbows represent beautiful, fairy-tale nature and fantasy. The rainbow will only appear after the rain, which shows that the pursuit of beauty must go through certain setbacks in order to achieve the desired goals and beautiful hopes.