Sea Captain by Johnstone's is a deep muted blue. Hex: #2D445C. RGB: 45, 68, 92. Price: approximately £13.37 per litre. The nearest equivalent from another manufacturer is Dulux Marine Waters (ΔE 2.4, “near-identical”), priced at approximately £14.40 per litre. Other close alternatives include Dulux Sapphire Springs 1 (ΔE 2.4) and Dulux Sapphire Salute (ΔE 2.4).

Sea Captain by Johnstone's

Hex: #2D445C
RGB: 45, 68, 92
Manufacturer: Johnstone's
Price per litre: £13.37
Price per m² (?): £2.23

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Nearest matches & alternatives from other brands

Colour	Manufacturer	ΔE	Match quality	Price/L	Price/m² (?)
Marine Waters	Dulux	2.4	Near-identical	£14.40 (£1.03 more)	£2.22
Sapphire Springs 1	Dulux	2.4	Near-identical	£14.40 (£1.03 more)	£2.22
Sapphire Salute	Dulux	2.4	Near-identical	£10.80 (£2.57 less)	£1.66
Royal Navy (No.257)	Little Greene	3.2	Very close	£29.20 (£15.83 more)	£4.49
Oxford Blue	Crown	3.6	Very close	—	—
Midnight Navy®	Crown	3.7	Very close	£8.80 (£4.57 less)	£1.47
Balloon Ride	Earthborn	3.7	Very close	£24.60 (£11.23 more)	£4.92
Blue Blood	Coat	3.7	Very close	£24.80 (£11.43 more)	£4.96
Royal Regatta 1	Dulux	3.9	Very close	£14.40 (£1.03 more)	£2.22