ΔE 5.9, very close: most people won’t see a difference side by side. Brown 3606 is a little darker, warmer than Tree Ancient.
Yes, for most jobs. Very close match (ΔE 6). Brown 3606 is a little darker, warmer than Tree Ancient.
The same difference applies the other way round: Tree Ancient is a little lighter, 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.
See Tree Ancient on the colour wheel See Brown 3606 on the colour wheel
All matches: Tree Ancient equivalents · Brown 3606 equivalents