A 'main colour', or a colour that can make other colours. These colours are blue, yellow and red. Red and blue purple, yellow and blue make green and yellow and red make range.
Green
yellow and blue
You would get a yellow-green.
BLUE
Yellow and blue.
yellow
GREEN
blue
brown
Yes, it kinda gets the persian blue colour.
Blue is a primary colour, you can not mix other colours to attain blue.