ΔE 11.7, fair: the same colour family, but not a straight swap. Camouflage Green is a little lighter, more saturated than Rucksack Tan.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Camouflage Green is a little lighter, more saturated than Rucksack Tan.
The same difference applies the other way round: Rucksack Tan is a little darker, more muted.
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.
See Rucksack Tan on the colour wheel See Camouflage Green on the colour wheel
All matches: Rucksack Tan equivalents · Camouflage Green equivalents