Iroko vs US Interior Yellow

How close are they?

ΔE 8.1, close: similar, with a visible difference side by side. US Interior Yellow is a little lighter, cooler than Iroko.

Can I use US Interior Yellow instead of Iroko?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). US Interior Yellow is a little lighter, cooler than Iroko.

Can I use Iroko instead of US Interior Yellow?

The same difference applies the other way round: Iroko is a little darker, 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.