Fun fact: Anticipating that their whizzy new machine was going to be hooked up to plenty of spare televisions from attics, the Amiga developers conducted a variety of tests on as much display hardware as they could get their hands on, from high-end color computer monitors to cruddy black-and-white and color TVs from junkyards. What they found was that the four colors most readily distinguishable from each other regardless of quality of display were black, white, blue, and orange. Which is why the Amiga 1.x GUI is based around those four colors.
Blue and orange constitute one of the highest-contrast color pairs, even occupying opposing corners in the YUV color space. This explains their extensive use in movie posters -- to attract the attention. It also probably explains their prominence in the Portal games and the Reddit user interface.
If you pick any two colors, you can probably find a few thousand stills demonstrating that the pair is "everywhere."
Not that Teal vs. Orange isn't a thing, I just don't feel this article has a stimulating way of demonstrating that it's an epidemic.
I like this article most [1]... it has a nice chart showing colors from movie posters over roughly one hundred years. And Blue/Orange have always been pronounced.
https://news.ycombinator.com/item?id=1194065
https://news.ycombinator.com/item?id=1193657