Neptune Seas vs Smokey Slate

Neptune Seas and Smokey Slate are both Dulux neutrals. The gap between them is ΔE 8.5 — “similar”. Neptune Seas is the lighter of the two. Both cost about £14.40 per litre.

	Neptune Seas	Smokey Slate
Hex	#627775	#5B6466
Lightness (L*)	48	42
Price / litre	£14.40	£14.40

Looking across brands instead? See Neptune Seas’s cross-brand matches and cheaper alternatives, or Smokey Slate’s.