ΔE 9.3, close: similar, with a visible difference side by side. Dark Yellow is a little lighter, more muted than Chromate Yellow Primer FS33481.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Dark Yellow is a little lighter, more muted than Chromate Yellow Primer FS33481.
The same difference applies the other way round: Chromate Yellow Primer FS33481 is a little darker, more saturated.
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 Chromate Yellow Primer FS33481 on the colour wheel See Dark Yellow on the colour wheel
All matches: Chromate Yellow Primer FS33481 equivalents · Dark Yellow equivalents