Paints › Tamiya › Medium Gray › vs Light Blue RLM78Medium Gray vs Light Blue RLM78
Brand Tamiya Range AS Spray (aircraft) Code AS-28 Type an opaque base/layer paint Swatch #7d919c (estimate)
Brand Vallejo Range Model Air Code 71.101 Type an opaque base/layer paint Swatch #759090 (estimate) How close are they?
ΔE 7.1, close: similar, with a visible difference side by side. Light Blue RLM78 is warmer than Medium Gray.
Can I use Light Blue RLM78 instead of Medium Gray? Usually, if you are not matching paint already on the model. Close match (ΔE 7). Light Blue RLM78 is warmer than Medium Gray.
Can I use Medium Gray instead of Light Blue RLM78? The same difference applies the other way round: Medium Gray is cooler.
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 Medium Gray on the colour wheel See Light Blue RLM78 on the colour wheel
Other Vallejo paints close to Medium Gray Other Tamiya paints close to Light Blue RLM78 All matches: Medium Gray equivalents · Light Blue RLM78 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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