Krieg Khaki vs Bone

How close are they?

ΔE 17.1, loose: different enough that you should pick on purpose. Bone is a little lighter, much more muted than Krieg Khaki.

Can I use Bone instead of Krieg Khaki?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Bone is a little lighter, much more muted than Krieg Khaki.

Can I use Krieg Khaki instead of Bone?

The same difference applies the other way round: Krieg Khaki is a little darker, much more saturated.

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.