Dark Neutral Grey vs Grey Blue

How close are they?

ΔE 10.1, fair: the same colour family, but not a straight swap. Grey Blue is a little lighter, more saturated than Dark Neutral Grey.

Can I use Grey Blue instead of Dark Neutral Grey?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Grey Blue is a little lighter, more saturated than Dark Neutral Grey.

Can I use Dark Neutral Grey instead of Grey Blue?

The same difference applies the other way round: Dark Neutral Grey is a little darker, more muted.

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.