Which form of colour can be created by adding grey?

Correct answer: Tone

The correct answer is D: adding grey to a colour creates a tone. Consider a strong blue. When grey is mixed with it, the blue generally appears less vivid, less intense, and more muted. That changed version is called a tone. A is incorrect because a tint is made by adding white, which lightens the colour. B is incorrect because a shade is made by adding black, which darkens the colour. C is incorrect because saturation describes the strength or intensity of a colour; it is not the usual name for the mixture produced by adding grey. D is correct because it names the result of combining a colour with grey. The key memory line is “white–tint, black–shade, grey–tone.” In actual artwork, the visible result can depend on the materials and proportions, but this is the standard school-level colour-theory distinction.