What is the result of adding black to a primary colour called?

Correct answer: Shade

The governing concept is the difference between tint, shade and secondary colour. Adding black lowers the value of a colour and produces a darker version called a shade, so option B is correct. A tint is made by adding white. A secondary colour results from mixing two primary colours, while a complementary colour is identified by its opposite position on a colour wheel, not by adding black.