No shortage of substitutes here, Night Blue from Vallejo matches at 85 percent and 3 brands carry a strong same-finish near-match. In the pot, Slate Grey reads as a neutral black, very dark and muted. Within the Monument Pro Acryl range it ladders cleanly, Dark Grey Blue for the shadows and Dark Orange Brown for the highlights. Treat it as an easy swap, just confirm the finish type matches before you commit.
Slate Grey equivalents and near misses
Fair warning: nothing matches Monument Pro Acryl Slate Grey cleanly. The options below are the least bad, and every one of them drifts.
Closest Vallejo equivalent: Vallejo Night Blue, close, with a hint of drift side by side (delta E 3.0).
Nearest in the AK Interactive catalog: AK Interactive Dark Prussian Blue, a near match with visible drift up close (delta E 3.7).
Best Scale75 option: Scale75 Eclipse Grey, a usable stand-in rather than a twin (delta E 4.1).
From Citadel: Citadel Corvus Black, workable at tabletop distance, not up close (delta E 5.0).
Worth knowing before you swap: Vallejo Night Blue runs slightly darker, which shows most where the paint thins over raised detail.
How to read the score
90+Close
80sUsable
<70Mix
Vallejo
AK Interactive
Scale75
Citadel
Revell
The Army Painter
Humbrol
Tamiya
P3 Paints
Green Stuff World
About this color
Color profile
Highlight and shade ladder
Match difficulty
Where painters use it
Frequently asked
What is the closest equivalent to Monument Pro Acryl Slate Grey?
The closest same-finish match is Vallejo Night Blue at 85% color similarity.
What color is Slate Grey?
Slate Grey is a very dark muted black with a neutral cast (hex #191820).
What do I highlight and shade Slate Grey with?
Highlight Slate Grey toward Dark Orange Brown and shade it down into Dark Grey Blue, both Monument Pro Acryl paints in the same finish family.