ΔE 9.1, close: similar, with a visible difference side by side. Dk Mediterr. Blue is a little lighter, more saturated, warmer than Russian Blue Lights.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Dk Mediterr. Blue is a little lighter, more saturated, warmer than Russian Blue Lights.
The same difference applies the other way round: Russian Blue Lights 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 Russian Blue Lights on the colour wheel See Dk Mediterr. Blue on the colour wheel
All matches: Russian Blue Lights equivalents · Dk Mediterr. Blue equivalents