Bluish Grey vs Dark Grey RLM42

How close are they?

ΔE 10.1, fair: the same colour family, but not a straight swap. Dark Grey RLM42 is a little darker than Bluish Grey.

Can I use Dark Grey RLM42 instead of Bluish Grey?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Dark Grey RLM42 is a little darker than Bluish Grey.

Can I use Bluish Grey instead of Dark Grey RLM42?

The same difference applies the other way round: Bluish Grey is a little lighter.

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.