Obsidian Pigment Toner vs Dark Seagray BS381C/638

How close are they?

ΔE 4.9, very close: most people won’t see a difference side by side. Dark Seagray BS381C/638 is a little lighter, cooler than Obsidian Pigment Toner.

Can I use Dark Seagray BS381C/638 instead of Obsidian Pigment Toner?

Yes, for most jobs. Very close match (ΔE 5). Dark Seagray BS381C/638 is a little lighter, cooler than Obsidian Pigment Toner.

Can I use Obsidian Pigment Toner instead of Dark Seagray BS381C/638?

The same difference applies the other way round: Obsidian Pigment Toner is a little darker, warmer.

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.