Red Oxide vs Flat Red

How close are they?

ΔE 11.6, fair: the same colour family, but not a straight swap. Flat Red is more saturated, cooler than Red Oxide.

Can I use Flat Red instead of Red Oxide?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Flat Red is more saturated, cooler than Red Oxide.

Can I use Red Oxide instead of Flat Red?

The same difference applies the other way round: Red Oxide is more muted, 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.