Link
ithic.com
I grew up in a town in the Anthracite region of Pennsylvania (Pennsyltuckey). There is no gray in Antracite, it is a shiny black, sometimes it even peacocks and turns a rainbow of colors.FWIW, antracite is high grade coal, so in colour terms I assume it's a mid-dark grey. Dark anthracite would be a rather dark grey in my lingo.