Which color is known to absorb light effectively?

The color that is known to absorb light effectively is black. This is because black surfaces do not reflect any light; instead, they absorb all wavelengths of visible light. When sunlight or another light source hits a black object, it takes in the energy from the light, which often results in that object becoming warmer compared to other colors that reflect some of the light.

In contrast, colors like white reflect most of the wavelengths of light, thereby absorbing very little. Red and blue colors, while they do absorb some light, reflect other wavelengths and therefore do not absorb light as effectively as black does. Thus, black is uniquely effective at absorbing light across the visible spectrum.