Why does the green color in plants disappear when wilting?

Answer 1

This means its not getting enough sunlight or water, therefore no photosynthesis. The plant has no chlorophyll, the product of photosynthesis. The chlorophyll is the green pigment found in plants when they're healthy, so your plant probably needs a sunnier spot to rest.

Answer 2

When plants wilt, the cells lose their turgidity due to lack of water, causing the chloroplasts containing chlorophyll to shrink and become less functional. Since chlorophyll is responsible for the green color in plants, its reduced activity results in the green color fading or disappearing as the plant wilts.