If a little blue is added to red, in which direction will the result move?

Correct answer: Toward violet

The governing concept is the relationship between colour components in a mixture. Red and blue are the two colours that combine toward violet. Since only a little blue is added to a larger amount of red, the result will remain red-biased but shift in the direction of violet. Orange is associated with red and yellow, green with yellow and blue, and yellow is not produced by adding blue to red. Therefore, B is correct.