If a neutral made from blue and orange appears too warm, what should be increased?

Correct answer: Blue

The governing concept is complementary neutralisation and temperature balance. Blue is the cool component, whereas orange is warm. If the mixture looks too warm, adding a small, controlled amount of blue offsets the excess orange and moves the mixture closer to neutral. Adding orange or yellow increases warmth, while white changes lightness rather than correcting the temperature. Thus option B is correct.