ΔE 10.0, fair: the same colour family, but not a straight swap. Scrofulous Brown is a little darker, more muted than Solar Flare.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Scrofulous Brown is a little darker, more muted than Solar Flare.
The same difference applies the other way round: Solar Flare is a little lighter, more saturated.
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 Solar Flare on the colour wheel See Scrofulous Brown on the colour wheel
All matches: Solar Flare equivalents · Scrofulous Brown equivalents