Phthalo Blue (Red Shade)

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Phthalo Blue (Red Shade) (PB 15:1) – Professional Handmade Watercolour

Phthalo Blue (Red Shade) – Professional Handmade Watercolour

Swatch Painted On: Saunders Waterford, White, Rough, 100% Cotton, Mould Made, Acid-Free, 300 gsm Watercolour Paper

Also Known As: Phthalocyanine Blue RS, Transparent Blue, Winsor Blue RS

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Description

Phthalo Blue (Red Shade) is a bold and brilliant watercolour pigment, celebrated for its intense, warm-leaning blue tone and outstanding versatility. Crafted with pure Phthalocyanine Blue (P.B. 15:1), this colour leans slightly towards red compared to cooler blues, making it ideal for vibrant skies, luminous waters, and richly saturated shadows.

This professional-quality pigment offers high tinting strength and excellent transparency, making it an excellent choice for layering, glazing, and creating glowing, fluid washes. When used at full concentration, it delivers a striking, deep blue with commanding presence; when diluted, it transitions into light, airy blues with subtle warmth—perfect for atmospheric gradients, oceanic effects, and airy skies.

Phthalo Blue (Red Shade) is a high staining pigment that binds firmly to the paper and maintains brilliance over time. With an AAA lightfastness rating, it guarantees long-lasting results, resisting fading even in high-exposure artworks. This non-granulating pigment mixes beautifully with a wide range of other colours—pair with yellows for vivid greens or with reds for muted purples and natural greys. It’s a go-to blue for any artist building a reliable, expressive watercolour palette.

We Recommend

Using distilled water with all our watercolours to preserve pigment purity and avoid unwanted chemical interference.

If you have any questions, we’re always happy to help—just send us a message!

Our handmade watercolours are perfect for artists of all levels, from passionate beginners to seasoned professionals who value premium-quality, artisan-crafted materials.

Product Information

Attribute Value
Pigment Copper Phthalocyanine
Pigment C.I. Number P.B 15:1
Series 1
Lightfastness AAA (Excellent)
Opacity Semi-Transparent
Granulation No Granulation
Staining High Staining

Customer Reviews

Based on 6 reviews
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E
Esra

A nice non granulating substitute for ultramarine blue

A
Andrew Harker
Phthalo blue red shade.

Lovely version of phthalo blue (red shade),Jackman's customer service first class also.

T
Trevor Bunting
Pthalo Blue

A lovely shade of blue which produces a nice transparent wash,& creates a wide range of colours when mixed with other pigments, especially shadows.

N
Nicki Rochelle
Excellent product

I bought this paint with yellow ochre to try out and am really happy with both, they are rich in pigment very creamy and sheer out beautifully. I loved them some much I bought 6 more colours last week. They are arrived in super quick time too. Impressive

S
Stephen Bracebridge
Great watercolour

Great colour, exactly what I would expect


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