Formerly known as Charcoal Slate PM-8. This colour is part of the Historic Colour collection. A collection of 191 time-honoured hues comprises our most popular palette. Steeped in tradition, the refined, elegant colours of the Historical Collection deliver timeless colour that can be used in traditional as well as contemporary spaces. Unveiled in 1976 to celebrate the US bicentennial, these colours are inspired by America's historic landmarks.