If you need to learn more than 16 colors go to an office supply store and look at the printer ink. The main colors for printer ink are black, magenta (not red), cyan (not blue) and yellow. Though 99% of customers, including women still call them red and blue. Some printers also have light magenta (pink) and light cyan (a very pale blue) and gray. Some also have photo black (don't ask me).
When you're done gasping at the ink prices, got to the paper section and then the binders section. In those places you will discover such colors as as orchid , sapphire , lime, teal. Oddly enough ink, paper and binder manufactures call yellow, yellow. (years ago we had goldenrod but its yellow now).
I still don't know what mauve is. We don't have that one.
Henry Ford had it right when he made cars in black only. Giving customers choices of color only causes trouble. Especially during back to school when they will throw the red book covers on the floor trying to get to the blue one. Or vice versa.