Cosmic Blue

PBk11 + PB15:1

Manufacturer

Michael Harding

Range

Artists' Watercolour

Color no.

W227

Color family

Blue

Transparency

Semi-transparent

Lightfastness

★★★★★ Excellent

Staining

Yes

Granulation

Yes

Price group / series

Series 2

Single pigment

About this pigment

PBk11 Mars Black

synthetic iron oxide (magnetite) · Generic lightfastness: I · Granulating

PB15:1 Phthalo Blue (Red Shade)

copper phthalocyanine (alpha) · Generic lightfastness: I

Swatch color as published by the manufacturer – on-screen rendering may differ. · michaelharding.co.uk/watercolours (product data, 2026-09-25)