Baron Blue vs Ignis Fatuus

How close are they?

ΔE 11.4, fair: the same colour family, but not a straight swap. Ignis Fatuus is a little lighter, warmer than Baron Blue.

Can I use Ignis Fatuus instead of Baron Blue?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Ignis Fatuus is a little lighter, warmer than Baron Blue.

Can I use Baron Blue instead of Ignis Fatuus?

The same difference applies the other way round: Baron Blue is a little darker, cooler.

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.