What is the difference between Prussian Blue and Ultramarine Blue?

ΔE 26 (loose). Ultramarine Blue is noticeably lighter, more saturated, warmer. Swatch colours are estimates.

Prussian Blue vs Ultramarine Blue

Prussian Blue

Brand: Green Stuff World
Range: Acrylic Colors
Code: 3223
Type: an opaque base/layer paint
Swatch: #00406a (estimate)

Ultramarine Blue

Brand: Vallejo
Range: Game Color
Code: 72.022
Type: an opaque base/layer paint
Swatch: #4e75b5 (estimate)

How close are they?

ΔE 25.5, loose: different enough that you should pick on purpose. Ultramarine Blue is noticeably lighter, more saturated, warmer than Prussian Blue.

Can I use Ultramarine Blue instead of Prussian Blue?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 26). Ultramarine Blue is noticeably lighter, more saturated, warmer than Prussian Blue.

Can I use Prussian Blue instead of Ultramarine Blue?

The same difference applies the other way round: Prussian Blue is noticeably darker, more muted, 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 Prussian Blue on the colour wheel See Ultramarine Blue on the colour wheel

Other Vallejo paints close to Prussian Blue

Prussian Blue vs Medium Blue (70.963)Model Color · ΔE 6, close · closer than Ultramarine Blue
Prussian Blue vs French Blue (71.088)Model Air · ΔE 7, close · closer than Ultramarine Blue
Prussian Blue vs Blue (71.004)Model Air · ΔE 8, close · closer than Ultramarine Blue

Other Green Stuff World paints close to Ultramarine Blue

Ultramarine Blue vs Summersea Blue (1793)Acrylic Colors · ΔE 11, fair · closer than Prussian Blue
Ultramarine Blue vs Blue Base (4115)Opaque Colors · ΔE 14, fair · closer than Prussian Blue
Ultramarine Blue vs Smoked Blue (3226)Acrylic Colors · ΔE 24, loose · closer than Prussian Blue

All matches: Prussian Blue equivalents · Ultramarine Blue equivalents