It's a real color (as real as colors can be, which is not very). It's not a spectral color, you won't find it on the rainbow. It's actually the result of your red and blue cones being activated together.
so this is based off my memory so there could be inaccuracies.
but what i've heard is that pink is the result of your brain registering a color because of specific color cones being activated but that your brain knows it's not actually that color and so it fills it in with pink.
So if the can shown wasn't Coke, but Sprite, it would still appear red? Or is it a mix of both? The eyes are confused and the brain fills in? Like when seeing pink as mentioned elsewhere.
Your brain isn't filling in anything. Your blue and green receptors get oversaturated by the cyan, which causes your red receptors to be more sensitive to the white light than the other two, which is why it appears red. The effect happens in your eye, not in your brain.