It’s all subjective
Whatever colors you see depend partly on where the light falls onto the eye, which stimulates either your long-wavelength or short-wavelength receptors. It’s up to the brain, however, to collate this information and create a viable color solution — to make colors out of this. So there is no right or wrong, just what you see. That’s why it’s fun! By performing this exercise, we learn a little about how our eyes work and our brains think.
One way to document the differences is to create a numerical scale that everyone can agree on. For instance, you can record not only the color you see but also its intensity. When comparing notes with others, it’s important not to reveal the colors and intensity you detect until
after everyone has completed observing. Otherwise, you run the risk of projecting your opinion onto others, which might sway what they see and think. Actually, that said, perhaps you should try sharing results after the first attempt and see if some people change their minds!
Good luck. As always, let me know what your eyes see and your brain thinks at
someara@interpac.com.