What is the result of adding grey to blue-green?

Correct answer: A tone will form and intensity will decrease

In colour theory, a tone is made by mixing a hue with grey. Therefore, adding grey to blue-green produces a less intense or muted blue-green tone. The exact value may rise or fall depending on whether the grey is lighter or darker than the original colour, so option D is too absolute. Grey does not transform the hue into red-orange or turn it into a primary colour, making A the only complete answer.