British Camo Green vs Kobold Grey

How close are they?

ΔE 20.8, loose: different enough that you should pick on purpose. Kobold Grey is a little lighter, much more muted, warmer than British Camo Green.

Can I use Kobold Grey instead of British Camo Green?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 21). Kobold Grey is a little lighter, much more muted, warmer than British Camo Green.

Can I use British Camo Green instead of Kobold Grey?

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