Sand Grey vs Ogryn Camo

How close are they?

ΔE 16.0, loose: different enough that you should pick on purpose. Ogryn Camo is a little lighter, cooler than Sand Grey.

Can I use Ogryn Camo instead of Sand Grey?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Ogryn Camo is a little lighter, cooler than Sand Grey.

Can I use Sand Grey instead of Ogryn Camo?

The same difference applies the other way round: Sand Grey is a little darker, 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.