Kawa Brown vs Burnt Sienna

How close are they?

ΔE 19.0, loose: different enough that you should pick on purpose. Burnt Sienna is noticeably darker, more saturated, cooler than Kawa Brown.

Can I use Burnt Sienna instead of Kawa Brown?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Burnt Sienna is noticeably darker, more saturated, cooler than Kawa Brown.

Can I use Kawa Brown instead of Burnt Sienna?

The same difference applies the other way round: Kawa Brown is noticeably lighter, 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.