Color me ecru!

Printers would of course agree about colors that are combinations of standardized bases, like red/green/blue or cyan/magenta/yellow/black, but I think those schemes are useful only to people who have learned what the base colors look like.

I can talk to you until you're bored about percentages of CMYK color, but I'm pretty helpless in the RGB environment, let alone more arcane schemes. I'd be more inclined to advocate for teaching people to more closely observe their surroundings so they could reference appropriate phenomena to describe colors.

If you're from New Hampshire, for example, you could probably be relied on to know what kind of blue is the blue of a Karner blue butterfly, and you could show the uninitiated a photo to describe that necktie or blouse you saw... And so on, ad infinitum.