If violet contains more red how may its temperature effect change?

Correct answer: Relatively warmer

The governing concept is the warm or cool bias created by the component colours in a mixture. Violet is commonly formed from red and blue; when the red proportion increases, the mixture shifts toward the warm side of the colour spectrum. It may therefore appear relatively warmer, although it remains violet rather than becoming pure red. More blue would produce the opposite, cooler bias. Hence, option B is correct.