Paints › Mr. Hobby › Barley Gray BS4800/18B21 › vs Light Blue RLM78Barley Gray BS4800/18B21 vs Light Blue RLM78
Brand Mr. Hobby Range Mr. Color Code C-334 Type an opaque base/layer paint Swatch #799190 (estimate)
Brand Vallejo Range Model Air Code 71.101 Type an opaque base/layer paint Swatch #759090 (estimate) How close are they?
ΔE 1.3, very close: most people won’t see a difference side by side. Our swatches for the two are almost the same.
Can I use Light Blue RLM78 instead of Barley Gray BS4800/18B21? Yes, for most jobs. Very close match (ΔE 1). The swatches are almost the same.
Can I use Barley Gray BS4800/18B21 instead of Light Blue RLM78? The same difference applies the other way round.
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 Barley Gray BS4800/18B21 on the colour wheel See Light Blue RLM78 on the colour wheel
Other Vallejo paints close to Barley Gray BS4800/18B21 Other Mr. Hobby paints close to Light Blue RLM78 All matches: Barley Gray BS4800/18B21 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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