Kawa Brown vs Blackert Brown

How close are they?

ΔE 15.4, loose: different enough that you should pick on purpose. Blackert Brown is noticeably lighter, more muted than Kawa Brown.

Can I use Blackert Brown instead of Kawa Brown?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Blackert Brown is noticeably lighter, more muted than Kawa Brown.

Can I use Kawa Brown instead of Blackert Brown?

The same difference applies the other way round: Kawa Brown is noticeably darker, more saturated.

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.