Spectrum Blue is a light muted grey with a neutral cast. Within the AK Interactive range it ladders cleanly, Blue Grey for the shadows and Medium Grey for the highlights. Spectrum Blue is a little less common: the closest same-finish match, Humbrol Hellgrau RLM 76, reaches 85 percent, and 2 other brands carry a strong same-finish alternative. Cross-brand swaps are adjust-on-model territory here, useful as a starting point rather than an exact replacement.
Spectrum Blue equivalents in other ranges
Spectrum Blue is awkward to replace. Treat the matches below as starting points for a mix rather than straight swaps.
Closest Humbrol equivalent: Humbrol Hellgrau RLM 76, a near match with visible drift up close (delta E 3.0).
Best Vallejo option: Vallejo Pale Grey Blue, close, with a hint of drift side by side (delta E 3.5).
From Monument Pro Acryl: Monument Pro Acryl White Blue, workable at tabletop distance, not up close (delta E 5.3).
Tamiya's closest color: Tamiya Light Sea Grey, a usable stand-in rather than a twin (delta E 5.8).
Worth knowing before you swap: Humbrol Hellgrau RLM 76 runs slightly lighter, which shows most where the paint thins over raised detail.
How to read the score
90+Close
80sUsable
<70Mix
Humbrol
Vallejo
Monument Pro Acryl
Tamiya
Citadel
P3 Paints
Scale75
The Army Painter
Two Thin Coats
Revell
About this color
Color profile
Highlight and shade ladder
Match difficulty
Found in 2 other brands with a same-finish match.
Where painters use it
Frequently asked
What is the closest equivalent to AK Interactive Spectrum Blue?
The closest same-finish match is Humbrol Hellgrau RLM 76 at 85% color similarity.
Is there a Vallejo equivalent of Spectrum Blue?
Yes. The closest Vallejo option is Pale Grey Blue at 82%, a same-finish match.
What color is Spectrum Blue?
Spectrum Blue is a light muted grey with a neutral cast (hex #A5B8BC).
What do I highlight and shade Spectrum Blue with?
Highlight Spectrum Blue toward Medium Grey and shade it down into Blue Grey, both AK Interactive paints in the same finish family.