ΔE 9.0, close: similar, with a visible difference side by side. Natural Steel is a little lighter, more saturated than Black Ice.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Natural Steel is a little lighter, more saturated than Black Ice.
The same difference applies the other way round: Black Ice 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 Black Ice on the colour wheel See Natural Steel on the colour wheel
All matches: Black Ice equivalents · Natural Steel equivalents