ΔE 11.9, fair: the same colour family, but not a straight swap. Pastel Blue is more saturated, cooler than Uniform Grey.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Pastel Blue is more saturated, cooler than Uniform Grey.
The same difference applies the other way round: Uniform Grey is more muted, warmer.
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 Uniform Grey on the colour wheel See Pastel Blue on the colour wheel
All matches: Uniform Grey equivalents · Pastel Blue equivalents