Grey

17 bricks, lightest to darkest: 1 clay, 16 natural stone. Lightness and undertone are measured on a photograph of each brick; colour on screen is a guide, and the sample is the reference.

Lightness, measured · L* 64 → 44

17 bricks read as grey, 2 of them as a second colour. Honed, tumbled, split, sawn, tumbled + sawn, rockface, sandblasted, sanded, flamed, natural cleft. Working sizes: 380 × 100 × 50 mm, 390 × 105 × 45 mm.

L* is lightness on the CIELAB scale (0 black, 100 white), measured on a photograph of each brick. Undertone comes from the same measurement: cool, neutral or warm. Even or varied describes the colour difference between courses. Screens differ: reserve a sample, or see the bricks at the Richmond showroom, before you specify.