A-18f Light Grey-Blue vs Light Blue RLM65

How close are they?

ΔE 4.5, very close: most people won’t see a difference side by side. Light Blue RLM65 is a little darker, cooler than A-18f Light Grey-Blue.

Can I use Light Blue RLM65 instead of A-18f Light Grey-Blue?

Yes, for most jobs. Very close match (ΔE 5). Light Blue RLM65 is a little darker, cooler than A-18f Light Grey-Blue.

Can I use A-18f Light Grey-Blue instead of Light Blue RLM65?

The same difference applies the other way round: A-18f Light Grey-Blue is a little lighter, warmer.

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.