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Deep tones
Thunderhead
Slate.
Three pieces of slate slide over one another like weather fronts. A pale dusting along the break catches the cold light.

The palette.
Approximate colour previewsCollection notes
In a stack of split roofing stone.
Slate is blue when dry, darker when wet and almost silver at a fresh cleft. Those differences sit very close together. A much paler grey makes them legible on a page.
Use Rain Cleft for the spine of an architecture journal and Riven Blue for the cover. Print the building section on Slate Powder sheets.
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