response: Yeah, it is on the RGB and CMYK color models.
original_response: Yeah, it is! Next to green and blue. It's also a primary color in the CMYK color model, which is lesser known.
history: My favorite color is Red. Oh, neat! What shade of red is your favorite? Red can be scarlet, crimson, or even pink in shade. I would have to say that my favorite shade has to be Crimson. I see, you know red was put on faces for groups like the Mayans and Ancient Egyptians during their ceremonies? No, I wonder why though, I don't think it would be very comfortable. Does red have any effect on people? Indeed it does, heterosexual men find red enhances a woman's attractiveness even though women say no colors enhance a man's. Isn't red also a primary color?
knowledge: It is a primary color in the RGB color model and the CMYK color model, and is the complementary color of cyan.