[jdmichal]

I wonder whether pictures would be a good source. I could see strong leanings towards blue (sky, water) and green (vegetation), and maybe also grey (concrete, asphalt). Would be interesting to do a collective histogram over a wide array of images and see if colors tend to average out or if there's clear peaks.

[bmm6o]

There's still plenty of room for enough entropy to power most use cases. Even two people trying to take identical pictures should have enormous differences when analyzed at the pixel level.

[ComNik]

Maybe relevant: https://news.ycombinator.com/item?id=8203144