X11 started using dark gray to mean 66% gray at some point in the 80s. https://en.wikipedia.org/wiki/X11_color_names https://en.wikipedia.org/wiki/X11_color_na

X11 started using dark gray to mean 66% gray at some point in the 80s. https://en.wikipedia.org/wiki/X11_color_names https://en.wikipedia.org/wiki/X11_color_names https://unix.stackexchange.com/questions/72919/what-are-the-origins-of-rgb-txt https://unix.stackexchange.com/questions/72919/what-are-the-...