You haven't refuted my point. I agree that rainbow colors are single-frequency. I'm asserting that most colors we see are not. Rainbow red is single-frequency.

You haven't refuted my point. I agree that rainbow colors are single-frequency. I'm asserting that most colors we see are not. Rainbow red is single-frequency. Most shades of red which we see are not. Rainbow blue is single-frequency. Most shades of blue which we see are not. Etc. You can have a red laser, but not a laser for most shades of red. You can't have things like a maroon laser. The only reason pink is special is because we do not consider it to be a shade of a rainbow color, which is a cultural thing.