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Winsor & Newton Professional Watercolor - Winsor Blue (Red Shade), 14 ml Tube

Watercolor

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$12.33

Blick Art Materials · recorded Oct 21, 2026, 7:23 AM UTC

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Product details
Size
14 ml
Blick SKU
00319-5632
About this product range
  • The trusted choice of professional watercolorists since 1832
  • Expansive range of 100+ colors
  • Majority single-pigment formulations for optimal mixing
  • Lightfast, permanent, and tested for color strength

Winsor & Newton Professional Watercolor Tubes are renowned for their enduring quality and heritage dating back to 1832. Trusted by renowned artists like John Singer Sargent, these watercolors combine historical recipes with modern advancements in pigment technology. Powerful, luminous, and unparalleled in their clarity, an expansive range of over 100 colors allows artists to create a palette that best suits their work.

Individually crafted for optimal pigment dispersion, over half the range features single-pigment formulations for predictable and accurate color mixtures. Colors are thoroughly tested for lightfastness and tint strength to ensure your work remains vibrant over time. A range of granulating colors allows artists to achieve beautiful textures that can be maximized through mixing.

__Cadmium-Free__-Formulated by chemists and approved by artists, these new paints deliver the same cadmium color strength, vibrancy, transparency, and lightfastness you expect, but without the cadmium.

Pigment information

General reference notes about pigments can describe other media (such as oil). They do not verify this product’s exact formulation or behavior.

Phthalo Blue

Pigment code
PB15
Type
organic
Chemical name
copper phthalocyanine
Chemical formula
C32H16CuN8
Properties
Phthalo Blues are pure and clean primary blues with superior covering power. They have a very high tinting strength and tend to overwhelm other pigments, but if color strength can be controlled, they make predictable mixed colors. In oil form, blues are very deep and slow drying. When mixed with other colors or if chlorine is added, Phthalo Blue quickly tends towards green. When using alone, mix with some white, as Phthalo Blue can be semi-transparent and almost black on its own. It is among the most compatible of modern colors with mineral colors and is considered more reliable than Prussian Blue, while sharing the same physical and color properties. Phthalo Blue is a good color for glazing.
Permanence
Phthalo Blues are completely lightfast and stable and are permanent for all paint uses. They are currently used in inks, coatings, and many plastics due to their stability and are considered a standard pigment in printing ink and the packaging industry.
Toxicity
Phthalo Blues have no significant hazards, although those made before 1982 contained some PCBs (polychlorinated biphenyls).
History
Developed by chemists using the trade name Monastral Blue, the organic blue dyestuff now known as Phthalo Blue was presented as a pigment in November 1935 in London. Its discovery was accidental. The dark color was observed in a kettle where a dye was being made from a British dyestuff plant. The demand for such a pigment came from commercial printers who wanted a cyan to replace Prussian Blue.
Description
Bocour Blue, Cyan Blue, Helio Blue, Heliogen Blue, Intense Blue, Monastral Blue, Phthalocyanine Blue, Rembrandt Blue, Thalo Blue, Winsor Blue, Phthalo Blue (RS).

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