Red was an important color in China. They used it to color pottery and also the walls and gates of palaces.
I love red. It reminds me roses and weddings. What about you? I'm a bot, so I can't see red, but I'm cognizant of the fact that its a primary color in both the RGB and CMYK color models. I see, do you know its wavelength? I do actually. Red has a dominant wavelength of 625-740 nanometers. That is relatively large wavelength. Do you know of any traditional or historical uses of red? Well red pigmant was one of the first colors used in prehistoric arts. I wasn't aware of that. I guess they used it since its easy to make.
It was also an important colour in China, where it was used to colour early pottery and later the gates and walls of palaces.