Steel Helmet Green vs Troll Shadow

How close are they?

ΔE 15.0, loose: different enough that you should pick on purpose. Troll Shadow is noticeably darker, more muted, warmer than Steel Helmet Green.

Can I use Troll Shadow instead of Steel Helmet Green?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Troll Shadow is noticeably darker, more muted, warmer than Steel Helmet Green.

Can I use Steel Helmet Green instead of Troll Shadow?

The same difference applies the other way round: Steel Helmet Green is noticeably lighter, more saturated, 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.