ΔE 11.8, fair: the same colour family, but not a straight swap. Ghost Green is a little lighter, more saturated, warmer than RLM 76 Light Blue.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Ghost Green is a little lighter, more saturated, warmer than RLM 76 Light Blue.
The same difference applies the other way round: RLM 76 Light Blue 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 RLM 76 Light Blue on the colour wheel See Ghost Green on the colour wheel
All matches: RLM 76 Light Blue equivalents · Ghost Green equivalents