An artist wants to make blue-green appear more blue. What should be increased in the mixture?

Correct answer: Blue

The governing concept is proportion in colour mixing. Blue-green contains blue and green, so increasing the amount of blue shifts the mixture toward the blue side of the colour wheel. Option B is therefore correct. Adding more green would make the colour greener, while yellow or red would introduce a different hue and move the mixture away from the intended blue-green balance.