Paints › Formula P3 › Greatcoat Grey › vs Black Grey RLM66Greatcoat Grey vs Black Grey RLM66
Brand Formula P3 Range Formula P3 Code 93043 Type an opaque base/layer paint Swatch #46505c (estimate)
Brand Vallejo Range Model Air Code 71.055 Type an opaque base/layer paint Swatch #444b50 (estimate) How close are they?
ΔE 4.9, very close: most people won’t see a difference side by side. Black Grey RLM66 is more muted than Greatcoat Grey.
Can I use Black Grey RLM66 instead of Greatcoat Grey? Yes, for most jobs. Very close match (ΔE 5). Black Grey RLM66 is more muted than Greatcoat Grey.
Can I use Greatcoat Grey instead of Black Grey RLM66? The same difference applies the other way round: Greatcoat Grey is 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 Greatcoat Grey on the colour wheel See Black Grey RLM66 on the colour wheel
Other Vallejo paints close to Greatcoat Grey Other Formula P3 paints close to Black Grey RLM66 All matches: Greatcoat Grey equivalents · Black Grey RLM66 equivalents
© 2026 AK Tabletop Studio. Swatch colours are estimates and will differ from the real paints; cross-brand matches are close, never exact.
Chart-listed matches come from the Two Thin Coats Paint Comparison Chart 2024, the Army Painter Warpaints Fanatic conversion chart, the AK 3rd Generation Acrylics equivalence table (2021) and the Herrick Games hobby paint comparison chart; the rest are a nearest-colour calculation.
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