What colors are orange and yellow?

Orange yellow is a kind of yellow with red inside, which combines the characteristics of orange and yellow, and usually presents the color closest to orange in the yellow series. This color, like oranges, is the warmest color in the warm color system, and the effect is eye-catching. It is generally used in painting to relieve the depression and dullness in black, and can be mixed with red pigments and yellow pigments. In the electromagnetic wave of visible light, orange is located in the middle and low frequency part, the frequency is about 480 ~ 510 THz, and the corresponding wavelength in air is about 590 ~ 625 nm.