Paris Green is a color that was originally used as a pigment in the 19th century. It is a bright greenish-yellow hue, and was often used to dye fabrics and wallpapers. The term 'Paris Green' is also used to refer to a poisonous copper arsenite compound, which was used as an insecticide and rodenticide in the late 19th century. The crossword solution for Paris Green is PARC, which stands for Parc Monceau, a public park in Paris, France.