ΔE 6.4, close: similar, with a visible difference side by side. Pale Blue Grey is a little lighter than Grauviolett RLM 75.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). Pale Blue Grey is a little lighter than Grauviolett RLM 75.
The same difference applies the other way round: Grauviolett RLM 75 is a little darker.
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 Grauviolett RLM 75 on the colour wheel See Pale Blue Grey on the colour wheel
All matches: Grauviolett RLM 75 equivalents · Pale Blue Grey equivalents