I thought and read about color mixing today. I made some counterintuitive discoveries, and i now have some thought experiments which i cannot test.
I could print a yellow image but i use a different printing technique on each half. On the left side i use color which is true yellow(so yellow pigments which reflect yellow wavelength), on the right i use small red and green squares next to each other(not overlapping) which from afar appear also as the same yellow. So both sides appear yellow to me because my cone cells on my retina are tricked. if i am now holding a monochromatic yellow filter in front of me, the right side would appear black because red and green cant get trough the filter, and the left side would be ... still the same yellow. So i could now distinguish between the left and right side.
So my question is, what would i see when i took multiple monochromatic filters with me and look around? Are there materials which appear a specific color because they are(So that the atoms absorb every other color or just emits this specific color) and some materials which reflect or emit different wavelenghts which then appear as a specific color?