response: Good to know. Red is also a primary color in the CMYK and RGB color models.
original_response: They really are. It's a primary color too, in the RGB model.
history: Red is an awesome color. Nice. It's next to orange on the spectrum of visible light. Oh yea? I love both those colors. Great! Red's dominant wavelength is around 625-740 nanometers. thats cool. Its complementary color is cyan in the CMYK and RGB color models. Red and bue are both great colors.
knowledge: It is a primary color in the RGB color model and the CMYK color model, and is the complementary color of cyan.