Earth Brown vs IDF Isr. Sand Grey (61-73)

How close are they?

ΔE 11.6, fair: the same colour family, but not a straight swap. IDF Isr. Sand Grey (61-73) is a little darker, more muted than Earth Brown.

Can I use IDF Isr. Sand Grey (61-73) instead of Earth Brown?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). IDF Isr. Sand Grey (61-73) is a little darker, more muted than Earth Brown.

Can I use Earth Brown instead of IDF Isr. Sand Grey (61-73)?

The same difference applies the other way round: Earth Brown is a little lighter, 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.