ΔE 10.7, fair: the same colour family, but not a straight swap. True Blue is a little lighter, more saturated than Griffon Blue.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). True Blue is a little lighter, more saturated than Griffon Blue.
The same difference applies the other way round: Griffon Blue is a little darker, 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 Griffon Blue on the colour wheel See True Blue on the colour wheel
All matches: Griffon Blue equivalents · True Blue equivalents