ΔE 7.0, close: similar, with a visible difference side by side. Midnight Olive is a little darker, more muted, cooler than S.C.C. No.15 Olive Drab.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Midnight Olive is a little darker, more muted, cooler than S.C.C. No.15 Olive Drab.
The same difference applies the other way round: S.C.C. No.15 Olive Drab is a little lighter, more saturated, 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 S.C.C. No.15 Olive Drab on the colour wheel See Midnight Olive on the colour wheel
All matches: S.C.C. No.15 Olive Drab equivalents · Midnight Olive equivalents