What is the condition characterized by the absence of all color pigments?

Albinism is the correct answer because it is a genetic condition that results in a significant reduction or complete absence of melanin, the pigment responsible for coloration in the skin, hair, and eyes. Individuals with albinism typically exhibit very light skin and hair, and they often have visual impairments due to the lack of pigment in the retina. This condition occurs due to mutations in genes involved in melanin production, leading to the characteristics associated with albinism.

In contrast, alopecia refers to hair loss, aneurysm describes a bulge in a blood vessel, and atrophy indicates a decrease in size or wasting away of an organ or tissue. These conditions do not pertain to pigment absence, making them irrelevant to the question about the absence of color pigments in the body.