ΔE 13.3, fair: the same colour family, but not a straight swap. Steel Grey is a little lighter, more saturated, warmer than Gunship Gray 2.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Steel Grey is a little lighter, more saturated, warmer than Gunship Gray 2.
The same difference applies the other way round: Gunship Gray 2 is a little 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.
See Gunship Gray 2 on the colour wheel See Steel Grey on the colour wheel
All matches: Gunship Gray 2 equivalents · Steel Grey equivalents