What is the difference between Fluorescent Yellow and Grim Rust?

ΔE 70 (loose). Grim Rust is noticeably darker, much more muted, warmer. Swatch colours are estimates.

Fluorescent Yellow vs Grim Rust

Fluorescent Yellow

Brand: AK Interactive
Range: 3rd Gen Standard
Code: AK11049
Type: a fluorescent or effect paint
Swatch: #e8e73c (estimate)

Grim Rust

Brand: Army Painter
Range: John Blanche Vol. 1-4
Code: Vol. 2 Effects
Type: a fluorescent or effect paint
Swatch: #a6591a (estimate)

How close are they?

ΔE 69.6, loose: different enough that you should pick on purpose. Grim Rust is noticeably darker, much more muted, warmer than Fluorescent Yellow.

Can I use Grim Rust instead of Fluorescent Yellow?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 70). Grim Rust is noticeably darker, much more muted, warmer than Fluorescent Yellow.

Can I use Fluorescent Yellow instead of Grim Rust?

The same difference applies the other way round: Fluorescent Yellow is noticeably lighter, much more saturated, cooler.

ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.

See Fluorescent Yellow on the colour wheel See Grim Rust on the colour wheel

Other Army Painter paints close to Fluorescent Yellow

Fluorescent Yellow vs Neon YellowWarpaints Air · ΔE 11, fair · closer than Grim Rust

Other AK Interactive paints close to Grim Rust

Grim Rust vs Fluorescent Orange (AK11081)3rd Gen Standard · ΔE 31, loose · closer than Fluorescent Yellow
Grim Rust vs Orange Fluor (AK12113)Glow Precision Fluor · ΔE 32, loose · closer than Fluorescent Yellow
Grim Rust vs Light Orange Fluor (AK12112)Glow Precision Fluor · ΔE 39, loose · closer than Fluorescent Yellow

All matches: Fluorescent Yellow equivalents · Grim Rust equivalents