Cambrian Blue is a cool-toned steely blue, like a dark denim. Like dark denim, this perennially cool and hard-working shade will go with everything. The name references the precious clay found in Northern Russia, prized as the rarest and most valuable clay in the world. Cambrian Clay contains a high concentration of silver chemical elements, which we've emulated with the light reflecting grey pigments apparent in this hue.Please allow an additional 5 days for delivery to Isles, Scottish Highlands, Northern Ireland, Republic of Ireland and other remote locations.