ΔE 16.3, loose: different enough that you should pick on purpose. Intermediate Blue FS35164 is a little lighter, much more muted, cooler than Griffon Blue.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Intermediate Blue FS35164 is a little lighter, much more muted, cooler than Griffon Blue.
The same difference applies the other way round: Griffon Blue is a little darker, much more saturated, 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 Griffon Blue on the colour wheel See Intermediate Blue FS35164 on the colour wheel
All matches: Griffon Blue equivalents · Intermediate Blue FS35164 equivalents