T'au Light Ochre vs Sand Brown

How close are they?

ΔE 14.9, fair: the same colour family, but not a straight swap. Sand Brown is a little darker, much more muted than T'au Light Ochre.

Can I use Sand Brown instead of T'au Light Ochre?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Sand Brown is a little darker, much more muted than T'au Light Ochre.

Can I use T'au Light Ochre instead of Sand Brown?

The same difference applies the other way round: T'au Light Ochre is a little lighter, 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.