Canopy Green vs Bright Yellow Green

How close are they?

ΔE 8.7, close: similar, with a visible difference side by side. Bright Yellow Green is a little darker, more saturated than Canopy Green.

Can I use Bright Yellow Green instead of Canopy Green?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Bright Yellow Green is a little darker, more saturated than Canopy Green.

Can I use Canopy Green instead of Bright Yellow Green?

The same difference applies the other way round: Canopy Green is a little lighter, more muted.

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.