Azure Sky 1 vs Royal Regatta 4
Azure Sky 1 and Royal Regatta 4 are both Dulux blues. The gap between them is ΔE 3.9 — “very close”. Royal Regatta 4 is the lighter of the two. Both cost about £10.20 per litre.
| Azure Sky 1 | Royal Regatta 4 | |
|---|---|---|
| Hex | #0087BD | #3F87BC |
| Lightness (L*) | 53 | 54 |
| 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 Royal Regatta 4’s.