ΔE 6.7, close: similar, with a visible difference side by side. Imperial Fist is more saturated than Dirty Yellow. They are different kinds of paint: AK Interactive Dirty Yellow is an opaque base/layer paint and Citadel Imperial Fist is a one-coat contrast-style paint, so they won’t behave the same on the model even where the colour is close.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Imperial Fist is more saturated than Dirty Yellow. They are different kinds of paint.
The same difference applies the other way round: Dirty Yellow is 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.
See Dirty Yellow on the colour wheel See Imperial Fist on the colour wheel
All matches: Dirty Yellow equivalents · Imperial Fist equivalents