Mortarion Grime

Several ranges orbit this color without landing on it. Here is the closest each brand manages, nearest first:

• Closest The Army Painter equivalent: The Army Painter Ochre Clay, a swap nobody spots at arm's length (delta E 1.1).
• Monument Pro Acryl's closest color: Monument Pro Acryl Fluorescent Yellow, a near match with visible drift up close (delta E 3.3), but it is an opaque acrylic so treat it as a color reference, not a swap.
• Nearest in the AK Interactive catalog: AK Interactive Interior Yellow Green, close, with a hint of drift side by side (delta E 3.6), but it is an opaque acrylic so treat it as a color reference, not a swap.
• Best Scale75 option: Scale75 Sol Yellow, workable at tabletop distance, not up close (delta E 5.3), but it is an opaque acrylic so treat it as a color reference, not a swap.
• From Tamiya: Tamiya Dark Yellow 2, a usable stand-in rather than a twin (delta E 7.7), but it is an opaque acrylic so treat it as a color reference, not a swap.
• Humbrol's closest color: Humbrol Gold, only a loose relative (delta E 8.8), but it is a metallic so treat it as a color reference, not a swap.

We checked the Lab numbers for a hidden catch and there is none: lightness and temperature both line up, so this swap is as safe as they come.