ΔE 14.1, fair: the same colour family, but not a straight swap. Smoke Blue is a little lighter, much more saturated than Brigade Grey.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Smoke Blue is a little lighter, much more saturated than Brigade Grey.
The same difference applies the other way round: Brigade Grey is a little darker, much 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 Brigade Grey on the colour wheel See Smoke Blue on the colour wheel
All matches: Brigade Grey equivalents · Smoke Blue equivalents