Dark Neutral Grey vs Signal Blue

How close are they?

ΔE 10.9, fair: the same colour family, but not a straight swap. Signal Blue is a little darker, more saturated than Dark Neutral Grey.

Can I use Signal 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 11). Signal Blue is a little darker, more saturated than Dark Neutral Grey.

Can I use Dark Neutral Grey instead of Signal Blue?

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