ΔE 7.7, close: similar, with a visible difference side by side. Emerald is a little darker, more saturated than Grayish Blue FS35237.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Emerald is a little darker, more saturated than Grayish Blue FS35237.
The same difference applies the other way round: Grayish Blue FS35237 is a little lighter, more muted.
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 Grayish Blue FS35237 on the colour wheel See Emerald on the colour wheel
All matches: Grayish Blue FS35237 equivalents · Emerald equivalents