Karak Stone vs Terre Verte Hue

How close are they?

ΔE 23.7, loose: different enough that you should pick on purpose. Terre Verte Hue is a little darker, more muted, cooler than Karak Stone.

Can I use Terre Verte Hue instead of Karak Stone?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 24). Terre Verte Hue is a little darker, more muted, cooler than Karak Stone.

Can I use Karak Stone instead of Terre Verte Hue?

The same difference applies the other way round: Karak Stone 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.