How will violet appear when it contains more blue?

Correct answer: Blue-violet

Violet is produced by combining red and blue. If the mixture contains a greater proportion of blue, its hue shifts toward blue and it appears blue-violet, making option C correct. Red-violet would be produced when red is increased. Yellow-violet and green-violet are not the usual results of adding more blue to a red-blue mixture. The governing concept is proportion in colour mixing: the component used in greater quantity gives the mixture a stronger bias toward its own hue.