Elysian Green vs Khaki

How close are they?

ΔE 21.0, loose: different enough that you should pick on purpose. Khaki is a little lighter, more muted, warmer than Elysian Green.

Can I use Khaki instead of Elysian Green?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 21). Khaki is a little lighter, more muted, warmer than Elysian Green.

Can I use Elysian Green instead of Khaki?

The same difference applies the other way round: Elysian Green is a little darker, 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.