Averaging is everywhere:
it is a way of speaking to shared experiences.
Each of us shares a vocabulary with quite a few other people.
Out of those words, the average words, comes the foundation of the language.

Tony Fernandes in Global Interface Design
calls attention to the average colors within a particular country.

He writes, "Color talks!"

Here is a series of stamps and envelopes from Japan.
Among the many colors, what colors are the most shared?