What is a scheme made with several light and dark forms of one colour called?

Monochromatic scheme

The correct answer is A: a scheme using several light and dark forms of one colour is a monochromatic scheme. The word “mono” means one, and “chromatic” relates to colour. Begin with one base hue, such as blue, and use its tint, shade, and tone to create variety without changing to a different base hue. A is correct because the scheme is built from one colour family. B is incorrect because a complementary scheme uses colours opposite each other on the colour wheel, usually two different hues. C is incorrect because a triadic scheme uses three hues spaced around the colour wheel. D is incorrect because an analogous scheme uses neighbouring hues, so it is not restricted to only one base hue. A monochromatic design can still show contrast through lightness and darkness. Memory cue: mono means one; one hue with light and dark variations is monochromatic.

This is a Class 10 Art Education question. Chapter: Fundamentals of Visual Arts. Topic: Colour.