ΔE 9.0, close: similar, with a visible difference side by side. AMT-7 Greyish Blue is a little darker, cooler than Blue FS 35190.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). AMT-7 Greyish Blue is a little darker, cooler than Blue FS 35190.
The same difference applies the other way round: Blue FS 35190 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.
See Blue FS 35190 on the colour wheel See AMT-7 Greyish Blue on the colour wheel
All matches: Blue FS 35190 equivalents · AMT-7 Greyish Blue equivalents