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What is colour capping?
Colour capping takes one colour family and sends it up the room in three values: the palest on the walls, a middle value on the cornice (and, if you like, the skirting), the deepest on the ceiling. Nothing cuts, nothing contrasts: the same colour deepens as the eye rises, like a sky gathering at dusk.
It is the elegant answer to the question everyone asks of a ceiling: white, or colour? Neither - deeper. The gesture comes from old houses, where cornice and ceiling took a denser shade to absorb the soot of candles; it returns today for what it does to a volume. It asks for a coherent colour family, whose three values share the same base pigment - which is exactly how our colours have been composed in London since 1884.