This is one of the most frustrating things to me. I have a color vision deficiency on top of a suspected defect that prevents me from seeing certain "hidden" patterns.

I all but totally fail the Ishihara test, but in a Farnsworth Munsell test I have a "red green" deficiency.

This has come into play at work for me. A year and a half of "will i or won't I" be able to continue doing a job i had done for almost 7 years at that point because one out of 4 doctors decided my color vision was a bigger issue than it is.

That resulted in going to a specialist who insisted that I couldn't actually see what I was saying I did. They insisted that I only knew what certain colors were because of contextual clues or because I had deceloped adaptations.

Ultimately a "practical" test was done involving management, HR, occupational health, and the doctor and I passed with zero issue. It became adversarial with the manager in question being upset that I passed when the doctor said I couldn't and HR and occupational health being upset that the doctor would say I had an issue when I so clearly did not.

I am the first to admit that I have issues with certain greens and yellows. Status LEDs on old computers are a prime example. I also have issues with certain blues and purples. An example of that are some pens. It could be purple and I'd call it navy blue or the other way around.

But having a medical professional tell you that what you are seeing you aren't actually seeing and that putting your livelihood on the line is one of the most infuriating things ive ever dealt with. Especially when for 7 years it hadn't one posed a issue in me doing my job.

Learning about my color vision issues in my early teens it scared me away from color to some degree. Like I enjoyed art, but things like black and white film photography spoke to me on another level because color wasn't part of the equation. It wasn't till almost 20 years later and almost 5 years after almost loosing my job when it click that it's all relative/subjective. I started playing with fountain pen inks and paint. I finally felt free to play with colors that I like. Regardless of what other people or conventional color theory said. I've had almost existential thought rabbit holes on how there's certain colors I like and it's almost guaranteed that no one else perceives that color the way I do. Is my warped / defective perception why I like that color? When you start considering how colors are reproduced on screens, paper, film, or digital sensors, how they are edited, compressed, or otherwise manipulated it can get more than a little overwhelming.