Golden Olive vs Mortarion Green Clear

How close are they?

ΔE 18.9, loose: different enough that you should pick on purpose. Mortarion Green Clear is a little darker, more muted, cooler than Golden Olive.

Can I use Mortarion Green Clear instead of Golden Olive?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Mortarion Green Clear is a little darker, more muted, cooler than Golden Olive.

Can I use Golden Olive instead of Mortarion Green Clear?

The same difference applies the other way round: Golden Olive is a little lighter, more saturated, 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.