English Field Brown vs Wood

How close are they?

ΔE 15.1, loose: different enough that you should pick on purpose. Wood is noticeably lighter, more muted than English Field Brown.

Can I use Wood instead of English Field Brown?

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

Can I use English Field Brown instead of Wood?

The same difference applies the other way round: English Field 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.