I was looking in the mirror one time and suddenly thought, "Wow! I'm pink. I mean, not just a little pink -- I'm super pink". I'd never thought about it before. It's just that after a decade of looking at everybody else that has a kind of tanned complexion, my view of "normal" had changed.
I used to have a pink shirt. I took out my pink shirt and put it on. "Wow. I look like a peach", I thought. I've never worn that shirt again. It doesn't suit my complexion. I don't know why I thought it suited my complexion before. What was I thinking, pink on pink? It's just crazy.
Don't get me wrong. I don't mind being pink. I've been pink my whole life and for a large majority of it, I didn't even notice. Most people were pink where I grew up. There were other people who were more tanned, and even some people who were kind of super tanned. I never really paid attention to it. It didn't matter to me. But after I realised that I was super pink, I started to wonder if those people realised that they were super tanned. Did it bother them?
Some people (very few to be honest) have treated me poorly only because I was pink. It hasn't really bothered me so far. It's not like I can change colour. In my original country, some people treated me poorly because I liked computers too much. When I moved to Japan, some people treated me poorly because I liked Japan too much. I probably could have changed those things, but I didn't. People treating me poorly for stupid reasons is crappy, but I'm too stubborn to worry about it much. I've met people who have suffered greatly because of it, though. I feel bad for them.
Anyway, it doesn't really matter, but I think the real answer to your question is that if you've never thought about it, then you are not a person of colour. If you suddenly realise what colour you are, then you will be. Whether you are or not makes very little difference to most people except you. Hopefully people won't treat you poorly (including because of what colour they think you are), but... there's always something isn't there? Whether it's because of your colour, or because they think you are annoying, or because they are just mad at something completely different and decide to take it out on you.
But yeah, the colour thing exists, even if you aren't aware of it.
You're certainly acting that way.