Grauviolett RLM 75 vs USN Light Ghost Grey

How close are they?

ΔE 8.1, close: similar, with a visible difference side by side. USN Light Ghost Grey is a little lighter than Grauviolett RLM 75.

Can I use USN Light Ghost Grey instead of Grauviolett RLM 75?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). USN Light Ghost Grey is a little lighter than Grauviolett RLM 75.

Can I use Grauviolett RLM 75 instead of USN Light Ghost Grey?

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.