There is a very high possibility that the colour you've been calling yellow for so long appears green to your friends. Not colour blindness, just different. Another thing is that it could be possible that you're hallucinating, why? Because the display that you're looking at is an RGB display so how can you even see the colour yellow ? It's an illusion which works only if you look at a display from a distance, if you can get closer and use a lense to magnify, you won't see any more colours than red, green and blue. We can only see "some colours", while the Shrimp Mantis can see colour in black too, the only reason we see black is because we cannot process the information reaching our brain. We could also say that these colours are are like people. That these people are basically just red, green and blue if we look at them too close, but to look at the whole picture we'd have to look at the person from a distance. This person's personality could also be another beautiful illusion formed with the basic three elements forming everyone. There are some Shrimp Mantises among us, who see colours in the darkest of us, the blankest of us. To find colour in the most divergent people and differentiate, one needs to have an ability to see more shades. And now back to point one, maybe opinions are like how everyone sees colour. And these colours (/opinions) are always the right ones. One can't force themselves to see (/understand) another's colours (/opinions), just try to understand this person doesn't see it your way.
