Oily Steel vs Dusken Green

How close are they?

ΔE 29.1, loose: different enough that you should pick on purpose. Dusken Green is a little lighter, much more saturated, cooler than Oily Steel.

Can I use Dusken Green instead of Oily Steel?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 29). Dusken Green is a little lighter, much more saturated, cooler than Oily Steel.

Can I use Oily Steel instead of Dusken Green?

The same difference applies the other way round: Oily Steel is a little darker, much more muted, 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.