Color me appointed, at least we're not missing out on fresh new colors!

There is two types of color blending, tint and light.

Tint is what is usually taught, primaries are red, blue,yellow and we make the rest with them.

With light however, the primaries are Red, Blue and Green. Most image editing software use light blending, so you can zoom on a pixel and use a color picker to get its RGB value. And to make yellow with light blending, you combine red and green

Extra fun fact! Tint primaries are actually Magenta, Yellow, and Cyan.

Red + Blue = Magenta Red + Green = Yellow Green + Blue = Cyan

Magenta + Yellow = Red Magenta + Cyan = Blue Cyan + Yellow = Green

My apologies if I missed the /s but eyesight works in additive colors, not subtractive

You mean light red?

The easiest way is to use the principles of conditioning. Pair a stimulus with a certain color light, then start flashing up different colored lights. If the organism is cued to the stimulus by multiple colors of lights, it means that they can't really distinguish between them.

That's how we tested when kids lose the ability to distinguish certain phonemes.

They asked them politely

They give them a miniature color blind print that has those numbers in them that are hidden if you are color blind.

Oh man.

12 year old me waiting for hours to rip mp3s from cds always wondered about this.

Like why isn't it already compressed?

The answer is that storage was available but processing wasn't. Amaze.

Shrimp has more color receptors because he doesn’t have enough neurons to run trichromacy, so he sees in EGA.

love this. nice job :)

Is moral of your story that adults having frequency detection limited to 16khz, with older adults lower, might still be able to detect music well enough?

That's silly thinking. Everyone knows birds aren't real, so they're just late-stage planes created by engineers forced to follow certain constraints.

Did a shit job of it too, got the wings all flapping around like a bunch of idiots.

Ha! I read the following Science new article just today about how Purple Only Exists In Our Brains. It's written for a younger audience (I think), but it lays out how our sight works, and how our brains trick us into seeing purple (a red-blue colour, as opposed to violet).

Poor shrimpos, no purple for them, I bet.

It’s amazing and crazy to think, too, that the “theater” our brains create is an equilibrium point of laziness (to save energy) and usefulness (to help survival). So, surely, there are things we are just unable to see. But also, probably, there are different things that get mapped to the same things in the “theater.” I’m just speculating though but it makes sense.

We don’t really detect direction of light exactly. Instead we detect the location in the eye where the light landed, and have lenses to focus the light onto our retina. That relationship does imply some of the directionality of the light, by ignoring light that goes in certain directions and relating the direction of light that does get detected to the location it ends up.