Colour Research
If we arrange all these colours around a circle we have a colour wheel. Looking at the colour wheel we can see that certain colours fall opposite to each other. Each colour has a complimentary or opposite hue. So on the colour wheel we have three complementary pairs.
Just as positive and negative magnets attract each other, so do complementary colours.
You could keep mixing adjacent colours to produce colour wheels with 12, 24, 48 or more variations; each time the difference between two adjacent colours becomes more subtle.
If you combine any two primary colour pigments, you end up with another trio of pigments: red and yellow make orange, yellow and blue make green, and red and blue make violet. These are the three secondary colours. It is important to find out what connotation these colours have for the Chinese/Japanese.