ΔE 7.4, close: similar, with a visible difference side by side. Russian Green 4BO is more saturated than Bleached Strap Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Russian Green 4BO is more saturated than Bleached Strap Grey.
The same difference applies the other way round: Bleached Strap Grey is more muted.
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 Bleached Strap Grey on the colour wheel See Russian Green 4BO on the colour wheel
All matches: Bleached Strap Grey equivalents · Russian Green 4BO equivalents