Thar Brown vs US Earth Yellow

How close are they?

ΔE 14.8, fair: the same colour family, but not a straight swap. US Earth Yellow is a little darker, more saturated, warmer than Thar Brown.

Can I use US Earth Yellow instead of Thar Brown?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). US Earth Yellow is a little darker, more saturated, warmer than Thar Brown.

Can I use Thar Brown instead of US Earth Yellow?

The same difference applies the other way round: Thar Brown is a little lighter, more muted, cooler.

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.