Chrome Oxide Green vs Green Sky

How close are they?

ΔE 15.0, fair: the same colour family, but not a straight swap. Green Sky is noticeably lighter than Chrome Oxide Green.

Can I use Green Sky instead of Chrome Oxide Green?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Green Sky is noticeably lighter than Chrome Oxide Green.

Can I use Chrome Oxide Green instead of Green Sky?

The same difference applies the other way round: Chrome Oxide Green is noticeably darker.

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.