Please capitalize where necessary: today the walls have a predominantly grey-black look, but originally the black and white colours were supplemented by bright red, yellow and blue colours. the changes in colour in the scagliola surfaces are due to the use of plant pigments (probably indigo) and cinnabar red and yellow in the original scagliola.
Today the walls have a predominantly grey-black look, but originally the black and white colours were supplemented by bright red, yellow and blue colours. The changes in colour in the scagliola surfaces are due to the use of plant pigments (probably indigo) and cinnabar red and yellow in the original scagliola.