How to get right base color

How to get right base color?

Base color: ( Usually White, Black, Red, Yellow, Blue as base color)

Purple: bright red + blue + black 2:3:5

Pink: purple + bright red 4:6

Orange: Medium yellow +bright red 7:3

Khaki color: white + yellow + black + bright red 7.5:1:1:0.5

Dark green: Medium yellow + dark Blue + Black 5:4:1

Ultramarine: Dark Blue + bright red 7:3

Purple: red + Dark blue 8:2

Pink: Bright red + white 4:6

Sapphire: Sapphire + white 4:6

Dark gray: white + black + blue 5:3:2

Green: Dark blue + purple + white 5:3:2

Brown: red + black 6:4

Green fluorescence: fluorescent yellow + white + fluorescent green 4:3:3