ΔE 14.4, fair: the same colour family, but not a straight swap. Dark Gunmetal is noticeably darker than Pearly Gates.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Dark Gunmetal is noticeably darker than Pearly Gates.
The same difference applies the other way round: Pearly Gates is noticeably 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.
See Pearly Gates on the colour wheel See Dark Gunmetal on the colour wheel
All matches: Pearly Gates equivalents · Dark Gunmetal equivalents