Colors.

I've been pondering on a question for some time now. I've tried to explain this question to a vast ammount of people over the years, but nobody can compare to my curiosity.

What if the color i see green as is what other people see purple as. But no one would be able to tell me i'm wrong because that's what i learned green as and that's what they learned green as. Does anyone know what i mean? Like, for example, what if i see an apple as red, but what i see the color red as other people see it as what i see purple as. Or if i see the sky as blue, other people see it as what i see green as but too me, their green is my blue.

I have no better way to explain this.

=/