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