My wife wrote a book and brought copies to sell. Someone asked her if she brought ones to sell and my wife said yes. Later when we meet with her she’s like “you’re sure I can have this?” My wife says something like “yeah I brought enough” and then she never paid lol. Even worse, the next day she wasn’t randomly holding a $20 bill and put it away. Either she’s the most rude and insanely conniving person ever or our life was a sitcom because wtf. There’s more context but I don’t wanna yap too long. My wife almost even took the money out of her hand thinking she just didn’t have cash the night before.
All that said, you deserve to get paid for your work!
Apart from the philosophical aspect which is unanswerable, I feel certain we see equivalent colors. This is an interesting article about it. https://en.wikipedia.org/wiki/CIE_1931_color_space Scientists found what the three primary colors our eyes see are. Because of the overlap in cone activation they’re actually imaginary colors that don’t exist.