ΔE 7.7, close: similar, with a visible difference side by side. Gryph-Charger Grey is a little lighter, more muted than Blue Gray. They are different kinds of paint: AMMO by Mig Blue Gray is an opaque base/layer paint and Citadel Gryph-Charger Grey is a one-coat contrast-style paint, so they won’t behave the same on the model even where the colour is close.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Gryph-Charger Grey is a little lighter, more muted than Blue Gray. They are different kinds of paint.
The same difference applies the other way round: Blue Gray is a little darker, more saturated.
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 Blue Gray on the colour wheel See Gryph-Charger Grey on the colour wheel
All matches: Blue Gray equivalents · Gryph-Charger Grey equivalents