What is the difference between Cultist Purple and Altdorf Guard Blue?

ΔE 19 (loose). Altdorf Guard Blue is noticeably darker, cooler. Swatch colours are estimates.

Cultist Purple vs Altdorf Guard Blue

Cultist Purple

Brand: Army Painter
Range: Warpaints Fanatic
Type: an opaque base/layer paint
Swatch: #6c5aa1 (estimate)

Altdorf Guard Blue

Brand: Citadel / Warhammer
Range: Colour: Layer
Type: an opaque base/layer paint
Swatch: #1f4a8a (estimate)

How close are they?

ΔE 18.8, loose: different enough that you should pick on purpose. Altdorf Guard Blue is noticeably darker, cooler than Cultist Purple.

Can I use Altdorf Guard Blue instead of Cultist Purple?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Altdorf Guard Blue is noticeably darker, cooler than Cultist Purple.

Can I use Cultist Purple instead of Altdorf Guard Blue?

The same difference applies the other way round: Cultist Purple is noticeably lighter, warmer.

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 Cultist Purple on the colour wheel See Altdorf Guard Blue on the colour wheel

Other Citadel paints close to Cultist Purple

Cultist Purple vs Calth Blue ClearColour: Air · ΔE 17, loose · closer than Altdorf Guard Blue
Cultist Purple vs Calgar BlueColour: Layer · ΔE 18, loose · closer than Altdorf Guard Blue
Cultist Purple vs Kakophoni PurpleColour: Layer · ΔE 19, loose · closer than Altdorf Guard Blue

Other Army Painter paints close to Altdorf Guard Blue

Altdorf Guard Blue vs Ultramarine BlueWarpaints Fanatic · ΔE 4, very close · closer than Cultist Purple
Altdorf Guard Blue vs Regal BlueWarpaints Fanatic · ΔE 6, very close · closer than Cultist Purple
Altdorf Guard Blue vs Frostveil (Vol. 3)John Blanche Vol. 1-4 · ΔE 7, close · closer than Cultist Purple

All matches: Cultist Purple equivalents · Altdorf Guard Blue equivalents