Chasm (No.SAP0027) by Sanderson is a mid-tone grey with a subtle cyan undertone. Hex: #64797C. RGB: 100, 121, 124. Price: approximately £19.60 per litre. The nearest equivalent from another manufacturer is Johnstone's Sea Floor (ΔE 0.7, “identical”), priced at approximately £12.36 per litre. Other close matches include Johnstone's Mineral Spring (ΔE 1.5) and Zoffany Teal (ΔE 2.1).

Chasm (No.SAP0027) by Sanderson

Hex: #64797C
RGB: 100, 121, 124
Manufacturer: Sanderson
Price per litre: £19.60

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Nearest matches from other manufacturers

Colour	Manufacturer	ΔE	Match quality	Price/L	Price/m² (?)
Sea Floor	Johnstone's	0.7	Identical	£12.36 (£7.24 less)	£2.06
Mineral Spring	Johnstone's	1.5	Near-identical	£12.36 (£7.24 less)	£2.06
Teal (No.ZOP0144)	Zoffany	2.1	Near-identical	£22.00 (£2.40 more)	—
Sorcerer's Spell	Johnstone's	2.1	Near-identical	£12.36 (£7.24 less)	£2.06
Saxe Blue	Craig & Rose	2.6	Near-identical	£18.00 (£1.60 less)	£2.57
Barrow Blue	Farrow & Ball	2.7	Near-identical	£25.60 (£6.00 more)	£3.94
Neptune Seas	Dulux	2.9	Near-identical	£10.20 (£9.40 less)	£1.57
Etruria (No.3)	Little Greene	2.9	Near-identical	£28.00 (£8.40 more)	£4.31
Turning Skies	Johnstone's	3.4	Very close	£12.36 (£7.24 less)	£2.06