color of something wet
Refers to the deepened or darkened color that appears when something becomes wet, such as fabric, stone, or wood.
雨に濡れた石畳の濡れ色が美しい。
The wet color of the rain-soaked stone pavement is beautiful.
この着
This kimono turns a deeper indigo when it takes on the color of being wet.
Compound of 濡れ (nure, 'wetness', from verb 濡れる nureru 'to get wet') and 色 (iro, 'color').