Blue-Green vs Light Green RLM25

How close are they?

ΔE 9.5, close: similar, with a visible difference side by side. Light Green RLM25 is a little darker, more muted than Blue-Green.

Can I use Light Green RLM25 instead of Blue-Green?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Light Green RLM25 is a little darker, more muted than Blue-Green.

Can I use Blue-Green instead of Light Green RLM25?

The same difference applies the other way round: Blue-Green is a little lighter, 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.