Primary colors: Red, Blue, Yellow
Secondary colors: Orange, Green, Purple
After that, the list goes on. Primary colors Red-Blue-Yellow being able to make practically all colors (And white being an "absence" of color and black being all colors when it comes to coloring.) All you really need is Red-Blue-Yellow-Black-White to make any color or hue of that color.
Red-Green-Blue being computer generated colors to make other colors.
Cyan-Magenta-Yellow-Black being printer colors to generate other colors.
And yes, it is annoying having to differentiate Cayenne from Cyan when you can just tell me dark red or light blue-green (though I already know Cyan is around that color range.) Though having to choose a specific color is a must I suppose... sort of like painting a certain color because how I see navy blue is like about this color