ΔE 10.3, fair: the same colour family, but not a straight swap. Intermediate Blue FS35164 is a little lighter, more saturated, cooler than Deep Grey.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Intermediate Blue FS35164 is a little lighter, more saturated, cooler than Deep Grey.
The same difference applies the other way round: Deep Grey is a little darker, more muted, 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 Deep Grey on the colour wheel See Intermediate Blue FS35164 on the colour wheel
All matches: Deep Grey equivalents · Intermediate Blue FS35164 equivalents