I was unexpectedly transfixed by this Technology Connections video about the color brown:

Brown is an amazing color because it highlights how we perceive and describe the world. […]

And the fascinating thing about brown is that it’s a color that exists due to context, not wavelength.

It’s just… orange? but… darker? And what we perceive as brown is contextually dependent: it changes based on how much light there is. A surprisingly fascinating topic.