ΔE 11.4, fair: the same colour family, but not a straight swap. Cobalt Violet Grey is a little darker, more saturated than Uniform Grey.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Cobalt Violet Grey is a little darker, more saturated than Uniform Grey.
The same difference applies the other way round: Uniform 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 Uniform Grey on the colour wheel See Cobalt Violet Grey on the colour wheel
All matches: Uniform Grey equivalents · Cobalt Violet Grey equivalents