Bluegrey Dusk vs Dark Grey

How close are they?

ΔE 10.8, fair: the same colour family, but not a straight swap. Dark Grey is more muted than Bluegrey Dusk.

Can I use Dark Grey instead of Bluegrey Dusk?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Dark Grey is more muted than Bluegrey Dusk.

Can I use Bluegrey Dusk instead of Dark Grey?

The same difference applies the other way round: Bluegrey Dusk is more saturated.

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.