Blue Grey is a mid-tone muted grey with a neutral cast. This is a common color; 3 other brands cover it, the nearest being AK Interactive Raf Pru Blue Bs381C/636 at 85 percent. Within the Humbrol range it ladders cleanly, Track Colour for the shadows and Satin US Medium Grey for the highlights. In practice you can substitute across brands here without anyone noticing at arm's length.
Blue Grey equivalents in other ranges
Blue Grey is awkward to replace. Treat the matches below as starting points for a mix rather than straight swaps.
Closest AK Interactive equivalent: AK Interactive Raf Pru Blue Bs381C/636, a near match with visible drift up close (delta E 3.0).
From Two Thin Coats: Two Thin Coats Shadow Blue, close, with a hint of drift side by side (delta E 3.8).
Tamiya's closest color: Tamiya Sea Grey 2, a near match with visible drift up close (delta E 4.0).
Nearest in the The Army Painter catalog: The Army Painter Uniform Grey, a usable stand-in rather than a twin (delta E 5.9).
Check it on a spare model first, because AK Interactive Raf Pru Blue Bs381C/636 sits slightly cooler than the original and the difference grows over large flat panels.
How to read the score
90+Close
80sUsable
<70Mix
AK Interactive
Two Thin Coats
Tamiya
The Army Painter
Citadel
Revell
Vallejo
Green Stuff World
Monument Pro Acryl
About this color
Color profile
Highlight and shade ladder
Match difficulty
Found in 3 other brands with a same-finish match.
Where painters use it
Frequently asked
What is the closest equivalent to Humbrol Blue Grey?
The closest same-finish match is AK Interactive Raf Pru Blue Bs381C/636 at 85% color similarity.
What color is Blue Grey?
Blue Grey is a mid-tone muted grey with a neutral cast (hex #5C6B73).
What do I highlight and shade Blue Grey with?
Highlight Blue Grey toward Satin US Medium Grey and shade it down into Track Colour, both Humbrol paints in the same finish family.