Transparent Red Iron Oxide vs Vat Orange

How close are they?

ΔE 14.9, fair: the same colour family, but not a straight swap. Vat Orange is a little lighter, much more saturated than Transparent Red Iron Oxide.

Can I use Vat Orange instead of Transparent Red Iron Oxide?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Vat Orange is a little lighter, much more saturated than Transparent Red Iron Oxide.

Can I use Transparent Red Iron Oxide instead of Vat Orange?

The same difference applies the other way round: Transparent Red Iron Oxide is a little darker, much 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.