ΔE 10.0, close: similar, with a visible difference side by side. Pastel Blue is a little darker, more saturated than Tanker Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Pastel Blue is a little darker, more saturated than Tanker Grey.
The same difference applies the other way round: Tanker Grey is a little lighter, 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 Tanker Grey on the colour wheel See Pastel Blue on the colour wheel
All matches: Tanker Grey equivalents · Pastel Blue equivalents