https://colormax.org/color-blind-test/I'm not color blind , I don't think. I can see red but I have a hard time picking blood out in anything but snow.
I've had deer run bleeding everywhere and I just will walk past it's trail not able to find blood, even when working through slowly. My friends and family always poke fun at me because I have a hard time finding blood. Lol.
Normally once I do find a little I can get on hands and knees and it starts to appear. The rest of the time I find my critter before I find blood.
Here is some blood I walked past this year and didn't see until I was dragging out. ( With my bow opening day. Only ran ~75 yards) entire blood trail was like pic below, however I found most the blood on the way out.
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For Christmas my dad gave me one of those lights that are supposed to make blood easier to spot. I haven't gotten to test it as I was out of tags when I got it but I'm looking forward to giving it a try next year.
Ps. It's not like my eyesight is bad. I'm young and can see well, although I do have glasses, but I see well without them to shoot open sights well.
Here is a link to a test you can take. It a very short version, but will give you an indication if you might have a form of color vision deficiency. Your eye dr can give you the full screening.
I got 25%, but I've known I have color "blindness" since I was a little kid.