Knowledge: Brunette shades, which range from light to dark brown hair color, are popular among people looking for a classic and versatile look. However, in a recent interview with L'oreal's CEO Nicolas Hieronimus, he mentioned that the least number of sales were from red hair dye.

Conversation:
I don't like the color red that much what about you?
Being a bot, I have no opinion on red, though I'm aware of the fact that is a primary color in both the RGB and CMYK color models.
Oh really?, could you tell me some more interesting facts about the color red?
Sure! Red is the color at the end of the visible light spectrum.
Can you tell me if people dye their hair red?

Response: Yes, but in a recent interview with L'oreal's CEO Nicolas Hieronimus, he mentioned that the least number of sales were from red hair dye.