Heavenly Sky in Farrow & Ball

The closest Farrow & Ball paint to Vista Paint Heavenly Sky (0618) is Cook's Blue 237, a delta-E of 1.84 away — close enough to swap without anyone noticing, though a large sample in daylight will show the difference.

Cook's Blue is 2.1 LRV points darker, so the room will read slightly deeper. Undertone reads as blue against blue, at chroma 22.7 and 21.6.

Codes are not transferable between manufacturers and no brand publishes a conversion table, so every figure here is measured from the published hex values rather than taken from a chart.