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Imperial Purple vs Stiffkey Blue

Imperial Purple and Stiffkey Blue are both Farrow & Ball blues. The gap between them is ΔE 10.6 — “similar”. Stiffkey Blue is the lighter of the two. Both cost about £26.40 per litre.

Imperial PurpleStiffkey Blue
Hex#51516A#4A5B6B
Lightness (L*)3538
Price / litre£26.40£26.40

Looking across brands instead? See Imperial Purple’s cross-brand matches and cheaper alternatives, or Stiffkey Blue’s.