You're all figments of my imagination

That's what I'm saying. We don't really know if what we see, is what everyone else sees. Everyone could have their own viewpoint of what is 'reality' and what is 'imagination'. My friend was talking to me about the other day about something like, "My green may be grass, but your green may be leaf, I could see pink as you could see black. My pink, is your black. All our views on reality are different". So like, I think everyone lives in a imagination world of their own, where most things are the same, but not everything. (Such as, everyone knows a PS2 is a PS2, but something like a tree could look different in your imagination than it does in someone elses).

Seeing a color is a photon entering your eye with a certain frequence, annoi some thingy (whatever's in the inside of an eye) which yells a signal to your brain: "I found a foton with this frequency!" But your brain doesn't know any physics however, so it just reads "hey that part is yellow". So a color as you're friend is talking is just the idea of that frequency, which is the same for everyone (except if you're color blind or something). So what I'm trying to say is colors don't exist. (If so, what would be the color of infrared if we would evolve into beings that could see that? Or ultraviolet? The answer is: Your brain would just tell you: "That spot emits ultraviolot." And the 'color' would be different than the others.)

As about the imagination thingy, I think:
If we're persons in your imagination, then your brain wouldn't allow yourself to worry about it. So, by contraposition, you worrying about it, so we're not a product of your imagination! Et voila: QED?
Kinda the idea behind: "I think, so I exist" I think?
That is, if your brain doesn't allow you to think freely. But if it was, I don't think there's a way to proove it. Maybe we should try to prove it can't be proven?


*thinks a bit*
I can't see any consequences if someone would prove it can(t) be proven so I'm stuck there also.
Darn (prove it cant be proven to be proven then? xD)