Underhive Ash vs Deck Grey

How close are they?

ΔE 14.9, fair: the same colour family, but not a straight swap. Deck Grey is noticeably lighter, more saturated, warmer than Underhive Ash.

Can I use Deck Grey instead of Underhive Ash?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Deck Grey is noticeably lighter, more saturated, warmer than Underhive Ash.

Can I use Underhive Ash instead of Deck Grey?

The same difference applies the other way round: Underhive Ash is noticeably darker, more muted, cooler.

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.