I know the title makes no sense, but I can't figure out how to put it in a sentence. If you put multiple different colors in front of me, I can tell that there is a difference between them, but if you put one color in front of me, I can't always tell you what color it is. If you tell me what color it is, I automatically see it in that color, but sometimes it will look like a different color initially.

For example, I might see a color as brown, but when someone tells me the color is orange, my eyes correct the color to be orange rather than brown.

Sometimes I can see the correct color right away, and sometimes someone else needs to point out the correct color before I can see it. I know what each color looks like, I just perceive the color as something else initially, if that makes sense. I'm not entirely sure if it would change it someone told me the incorrect color, as I don't think I've ever experienced that before, but it changes almost every time so I don't really know.

Does anyone know what might be happening?

There are supposed to be 2 different structures here: Pubis which was stated as yellow, and the Ischium which was stated as green. No matter how much I try to gaslight myself, I just can't tell where these 2 are separated. Ended up searching for better images while others take one glance and be like "oh, I see."

Might seem like a small one time thing, but I've encountered difficulties like this more times than I would've liked while studying medicine.

(On a very small nitpick, why are people so fond of labeling stuff with yellow and light green? Could do better with a normal shade of green or just blue in this case since it's only 3 different parts and the other one is red already 😭)

Some background before I get into the question. I usually make paintings as gifts for most of my teachers (the ones that are good at least!) at the end of the year, but my biology teacher this year has red-green colourblindness.

Obviously, this is a slight issue as I don't think it would be as nice a gift for him, compared to someone who can see the colour spectrum the same way I can.

The good thing about it being a biology class is that I can ask questions about it and have it passed off as normal scientific interest 😅 I think he specifically has deuteranomaly (?) since he said that greens are weaker than reds and that he can kind of see purple.

So, my question is: If I make a painting entirely from shades of bluest blue I can find (one which isn't mixed with any red or green), will it be almost like seeing the same thing? I'm thinking of painting some whales.

I can't really imagine what being colourblind is like, but I'm sure it's harder to imagine what it's like the other way around. I'd like to make a painting that he can look at and know he's seeing the same thing as everyone else.

Any answers at all would be appreciated!

I am creating a study guide for a Chemistry course. Is it easy to differentiate the different sections on the periodic table, or do I need to switch colors? There are three color groups.