response: In fact, red was among the first colors prehistoric artists used, from ochre.
original_response: Me too! Actually, red pigment is one of the first colors that was used way back in prehistoric times.
history: My favorite color is red. Red is at the end of the spectrum of light. It's with orange and opposite of violet. I didn't know that. What else do you know about red? It's actually a primary color for the RGB and CMYK color model. I learned about primary colors in school when I was little. Great! In addition, the planet Mars gets its red color from iron oxide. I wish we could travel to Mars.
knowledge: Red pigment made from ochre was one of the first colors used in prehistoric art.