What will happen to red when black is added?

Correct answer: Darker

Direct answer: C, darker. In basic colour instruction, adding black to red lowers its value, so the red appears deeper or darker. A darker version made by adding black is called a shade. A is wrong because black does not normally make a colour brighter or more vivid; it reduces lightness. B is wrong because lightness is increased by adding white, which creates a tint. D is wrong because adding black cannot turn red into white; white is a separate neutral colour and would require a completely different mixture. The amount of black matters: even a small amount can strongly change many paints, so it is usually added carefully. The hue may also become less vivid, but the direct result tested here is reduced value and greater darkness. Memory cue: black equals shade and darker; white equals tint and lighter.