Ash grey is a color that is often described as a pale gray with a hint of blue and green. Some synonyms for ash grey include charcoal, slate, pewter, silver, and grey-blue. Charcoal is a darker shade of gray with black undertones, while slate is a cool, blue-grey color. Pewter is a metallic gray that has a slight sheen to it, and silver is a lighter, shimmery gray with hints of white. Grey-blue is a soft hue that combines gray with a touch of blue for a calming and cool effect. These synonyms provide a range of options for describing the ash grey color, depending on the desired tone and nuance.