Yep, used in the early MacOS color picker as well when displaying greyscale from RGB values. The three weights (which of course add to 1.0) clearly show a prefe

Yep, used in the early MacOS color picker as well when displaying greyscale from RGB values. The three weights (which of course add to 1.0) clearly show a preference for the green channel for luminosity (as was discussed in the article).