Why are just two black and white colors preferred to multiple colors in paintings?
A.
Two colors - black and white - are related to Daoist ideals of simplicity and authenticity, they represent the reality as it is. Also, a line or a shape is valued more than color.
B.
In ancient times, it used to be expensive to produce different colors and Chinese as pragmatical people liked frugality.
C.
Multiple colors represent chaos - the opposite of Dao, this why should be avoided.
D.
Not black and white, but black, red and white Chinese artists prefer in paintings.