Old Red vs Moonpetal

How close are they?

ΔE 14.7, fair: the same colour family, but not a straight swap. Moonpetal is noticeably darker, more saturated than Old Red.

Can I use Moonpetal instead of Old Red?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Moonpetal is noticeably darker, more saturated than Old Red.

Can I use Old Red instead of Moonpetal?

The same difference applies the other way round: Old Red is noticeably lighter, more muted.

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.