Knowledge: Batman kills people on the darker side of the world. On the other hand, crimson is a gloomy shade of red.

Conversation:
I really love the color red! It is so vibrant!
Cool! Red has lots of different tints and shades. Do you have a favorite?
Hmmm, I am not sure. Is there a name for the darker side?

Response: Oh, the darker side of red is called crimson.