Interior Yellow Green vs Cosmic Dust

How close are they?

ΔE 11.2, fair: the same colour family, but not a straight swap. Cosmic Dust is a little lighter, more muted than Interior Yellow Green.

Can I use Cosmic Dust instead of Interior Yellow Green?

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

Can I use Interior Yellow Green instead of Cosmic Dust?

The same difference applies the other way round: Interior Yellow Green 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.