ΔE 5.6, very close: most people won’t see a difference side by side. Sky Blue is a little darker, more muted than Hellblau RLM 65.
Yes, for most jobs. Very close match (ΔE 6). Sky Blue is a little darker, more muted than Hellblau RLM 65.
The same difference applies the other way round: Hellblau RLM 65 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.
See Hellblau RLM 65 on the colour wheel See Sky Blue on the colour wheel
All matches: Hellblau RLM 65 equivalents · Sky Blue equivalents