Nº1 Light Green (FS34151) vs Green Yellow

How close are they?

ΔE 10.7, fair: the same colour family, but not a straight swap. Green Yellow is a little lighter, more muted than Nº1 Light Green (FS34151).

Can I use Green Yellow instead of Nº1 Light Green (FS34151)?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Green Yellow is a little lighter, more muted than Nº1 Light Green (FS34151).

Can I use Nº1 Light Green (FS34151) instead of Green Yellow?

The same difference applies the other way round: Nº1 Light Green (FS34151) is a little 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.