Azure Sky 1 vs Celestial Blue 4
Azure Sky 1 and Celestial Blue 4 are both Dulux blues. The gap between them is ΔE 5.1 — “close”. Azure Sky 1 is the lighter of the two, and Celestial Blue 4 the warmer. Both cost about £10.20 per litre.
| Azure Sky 1 | Celestial Blue 4 | |
|---|---|---|
| Hex | #0087BD | #1883A7 |
| Lightness (L*) | 53 | 51 |
| Price / litre | £10.20 | £10.20 |
More Dulux comparisons
Looking across brands instead? See Azure Sky 1’s cross-brand matches and cheaper alternatives, or Celestial Blue 4’s.