Flat Blue is a dark moderate blue with a cool undertone. It builds a smooth gradient with Royal Blue underneath and Blue Violet on the highlights, all in the Vallejo line. This color is somewhat distinctive: 1 brand offers a strong same-finish match, Two Thin Coats Marine Blue closest at 90 percent. A cross-brand swap will get you most of the way, but eyeball it against the original first.
Flat Blue equivalents in other ranges
No brand clones Flat Blue outright, but 1 range comes close enough to swap. The best candidate from each catalog:
- Closest Two Thin Coats equivalent: Two Thin Coats Marine Blue, close enough that batch variation matters more (delta E 1.9).
- Best The Army Painter option: The Army Painter Gothic Blue, a usable stand-in rather than a twin (delta E 4.6).
- From Tamiya: Tamiya JNSDF Blue, workable at tabletop distance, not up close (delta E 5.6).
- Citadel's closest color: Citadel Calgar Blue, a usable stand-in rather than a twin (delta E 5.7).
- Nearest in the Green Stuff World catalog: Green Stuff World Ultramar Blue, workable at tabletop distance, not up close (delta E 6.6).
- Best P3 Paints option: P3 Paints Caspian Blue, a usable stand-in rather than a twin (delta E 6.7).
Worth knowing before you swap: Two Thin Coats Marine Blue runs slightly warmer, which shows most where the paint thins over raised detail.
How to read the score
90+Close
80sUsable
<70Mix
Two Thin Coats
The Army Painter
Tamiya
Citadel
Green Stuff World
P3 Paints
AK Interactive
Monument Pro Acryl
Scale75
Revell
About this color
Color profile
Highlight and shade ladder
Pairs well with
Try any paint in the scheme toolMatch difficulty
Where painters use it
Frequently asked
What is the closest equivalent to Vallejo Flat Blue?
The closest same-finish match is Two Thin Coats Marine Blue at 90% color similarity.
Is there a The Army Painter equivalent of Flat Blue?
Yes. The closest The Army Painter option is Gothic Blue at 77%, a same-finish match.
What color is Flat Blue?
Flat Blue is a dark moderate blue with a cool undertone (hex #3F4873).
What do I highlight and shade Flat Blue with?
Highlight Flat Blue toward Blue Violet and shade it down into Royal Blue, both Vallejo paints in the same finish family.