Zamesi Desert vs Sun Bleach Yellow

How close are they?

ΔE 18.6, loose: different enough that you should pick on purpose. Sun Bleach Yellow is a little lighter, more muted, cooler than Zamesi Desert.

Can I use Sun Bleach Yellow instead of Zamesi Desert?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Sun Bleach Yellow is a little lighter, more muted, cooler than Zamesi Desert.

Can I use Zamesi Desert instead of Sun Bleach Yellow?

The same difference applies the other way round: Zamesi Desert is a little darker, more saturated, 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.