Kruleboyz Green vs Dark Yellow

How close are they?

ΔE 8.4, close: similar, with a visible difference side by side. Dark Yellow is more saturated than Kruleboyz Green.

Can I use Dark Yellow instead of Kruleboyz Green?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Dark Yellow is more saturated than Kruleboyz Green.

Can I use Kruleboyz Green instead of Dark Yellow?

The same difference applies the other way round: Kruleboyz Green 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.