Tallarn Sand vs Golden Brown

How close are they?

ΔE 24.0, loose: different enough that you should pick on purpose. Golden Brown is much more saturated, warmer than Tallarn Sand.

Can I use Golden Brown instead of Tallarn Sand?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 24). Golden Brown is much more saturated, warmer than Tallarn Sand.

Can I use Tallarn Sand instead of Golden Brown?

The same difference applies the other way round: Tallarn Sand is much 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.