ΔE 14.3, fair: the same colour family, but not a straight swap. German Yellow is a little lighter, much more muted than Interior Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). German Yellow is a little lighter, much more muted than Interior Green.
The same difference applies the other way round: Interior Green is a little darker, much more saturated.
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 Interior Green on the colour wheel See German Yellow on the colour wheel
All matches: Interior Green equivalents · German Yellow equivalents