What is commonly produced by mixing red and blue in traditional painting?

Correct answer: Violet

The governing concept is the traditional RYB pigment model used in basic painting instruction. Red and blue are treated as primary pigments, and their mixture commonly produces violet, a secondary colour. Red plus yellow gives orange, yellow plus blue gives green, and yellow alone is not the result of this pair. Actual pigment quality and proportions can shift the hue, but option B is the standard answer.