ΔE 19.0, loose: different enough that you should pick on purpose. Ancestral Blue is a little lighter, much more saturated than Gryph-Charger Grey.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Ancestral Blue is a little lighter, much more saturated than Gryph-Charger Grey.
The same difference applies the other way round: Gryph-Charger Grey is a little darker, much 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 Gryph-Charger Grey on the colour wheel See Ancestral Blue on the colour wheel
All matches: Gryph-Charger Grey equivalents · Ancestral Blue equivalents