ΔE 5.9, very close: most people won’t see a difference side by side. Abyssal Turquoise is more saturated, warmer than Extra Dark Seagray BS381C 640.
Yes, for most jobs. Very close match (ΔE 6). Abyssal Turquoise is more saturated, warmer than Extra Dark Seagray BS381C 640.
The same difference applies the other way round: Extra Dark Seagray BS381C 640 is more muted, cooler.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Extra Dark Seagray BS381C 640 on the colour wheel See Abyssal Turquoise on the colour wheel
All matches: Extra Dark Seagray BS381C 640 equivalents · Abyssal Turquoise equivalents