ΔE 7.4, close: similar, with a visible difference side by side. Sterling Silver is a little lighter, more saturated than Mythril Blade.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Sterling Silver is a little lighter, more saturated than Mythril Blade.
The same difference applies the other way round: Mythril Blade is a little darker, 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 Mythril Blade on the colour wheel See Sterling Silver on the colour wheel
All matches: Mythril Blade equivalents · Sterling Silver equivalents