Which is relatively cooler between an orange-biased red and a violet-biased red?

Correct answer: Violet-biased red

The governing concept is colour temperature within a hue family. An orange-biased red contains more yellow-orange influence, so it generally feels warmer. A violet-biased red contains a stronger blue influence, and blue is conventionally cool; therefore, the violet-biased red is relatively cooler. Option A is warmer, option C ignores the hue bias, and option D also describes a warmer yellow influence rather than a cooler mixture.