Castle stone, weathered to a calm, still grey.
Greystoke is a neutral grey.
It can be described as neutral, medium and colorless.
Set in black, because black reads best on it.
Greystoke is a village and civil parish on the edge of the Lake District National Park in Cumbria, England, about 4 miles (6.4 km) west of Penrith. At the 2001 census the parish had a population of 642, increasing marginally to 654 at the 2011 Census. The village centres on a green surrounded by stone houses and cottages.
Read on WikipediaGreystoke Castle is in the village of Greystoke 8 kilometres (5.0 mi) west of Penrith in the county of Cumbria in northern England.. It is owned by the Howard family and is a private residence including a castle and family estate with no public access.
Read on WikipediaProper noun