Niblet Green vs Oxide Green

How close are they?

ΔE 15.3, loose: different enough that you should pick on purpose. Oxide Green is a little darker, more muted, warmer than Niblet Green.

Can I use Oxide Green instead of Niblet Green?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Oxide Green is a little darker, more muted, warmer than Niblet Green.

Can I use Niblet Green instead of Oxide Green?

The same difference applies the other way round: Niblet Green is a little lighter, more saturated, cooler.

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.