T'au Light Ochre vs Sahara Yellow

How close are they?

ΔE 10.8, fair: the same colour family, but not a straight swap. Sahara Yellow is more saturated, cooler than T'au Light Ochre.

Can I use Sahara Yellow 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 11). Sahara Yellow is more saturated, cooler than T'au Light Ochre.

Can I use T'au Light Ochre instead of Sahara Yellow?

The same difference applies the other way round: T'au Light Ochre is more muted, 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.