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 £14.40 per litre.

	Azure Sky 1	Royal Regatta 4
Hex	#0087BD	#3F87BC
Lightness (L*)	53	54
Price / litre	£14.40	£14.40

Looking across brands instead? See Azure Sky 1’s cross-brand matches and cheaper alternatives, or Royal Regatta 4’s.