ΔE 10.6, fair: the same colour family, but not a straight swap. Krieg Khaki is noticeably lighter, warmer than Silver Grey No.28.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Krieg Khaki is noticeably lighter, warmer than Silver Grey No.28.
The same difference applies the other way round: Silver Grey No.28 is noticeably darker, 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 Silver Grey No.28 on the colour wheel See Krieg Khaki on the colour wheel
All matches: Silver Grey No.28 equivalents · Krieg Khaki equivalents