ΔE 24.1, loose: different enough that you should pick on purpose. Smoked Blue is noticeably darker, much more muted, cooler than Baron Blue.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 24). Smoked Blue is noticeably darker, much more muted, cooler than Baron Blue.
The same difference applies the other way round: Baron Blue is noticeably lighter, much more saturated, 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 Baron Blue on the colour wheel See Smoked Blue on the colour wheel
All matches: Baron Blue equivalents · Smoked Blue equivalents