ΔE 7.7, close: similar, with a visible difference side by side. Light Blue RLM76 is more muted, warmer than Light Blue (Luftwaffe).
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Light Blue RLM76 is more muted, warmer than Light Blue (Luftwaffe).
The same difference applies the other way round: Light Blue (Luftwaffe) is more saturated, cooler.
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.
See Light Blue (Luftwaffe) on the colour wheel See Light Blue RLM76 on the colour wheel
All matches: Light Blue (Luftwaffe) equivalents · Light Blue RLM76 equivalents