ΔE 11.7, fair: the same colour family, but not a straight swap. Red Wash is a little darker, more muted, cooler than Blush Red.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Red Wash is a little darker, more muted, cooler than Blush Red.
The same difference applies the other way round: Blush Red is a little lighter, 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 Blush Red on the colour wheel See Red Wash on the colour wheel
All matches: Blush Red equivalents · Red Wash equivalents