ΔE 7.1, close: similar, with a visible difference side by side. Mythril Blade is a little darker than Shining Silver.
✓ Two Thin Coats comparison chart lists these two as equivalents.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Mythril Blade is a little darker than Shining Silver.
The same difference applies the other way round: Shining Silver is a little lighter.
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 Shining Silver on the colour wheel See Mythril Blade on the colour wheel
All matches: Shining Silver equivalents · Mythril Blade equivalents