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Winsor & Newton Cotman Watercolor Half Pan - Ultramarine

Cotman Watercolor

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$6.29

Blick Art Materials · recorded Oct 21, 2026, 12:21 PM UTC

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Product details
Blick SKU
00337-5230
About this product range
  • Quality student-grade range
  • 40+ colors, including modern and historic pigments
  • Strong tint strength
  • Reliable transparency and lightfastness
  • Uniform consistency for beginners and students

Winsor & Newton Cotman Watercolors deliver the quality the brand is known for at an accessible price for students and beginners. The range includes over 40 colors chosen for their tone, undertone, strength, and mixability. Whether you're building a basic palette or exploring color mixing, Cotman delivers smooth, even washes with vibrant results.

Made with both traditional and modern pigments—from natural earths to organic compounds—these watercolors offer a range of effects, from easy-lifting hues to more staining, expressive shades. Most colors are transparent, and the consistent feel across the range makes Cotman especially friendly for beginners.

By replacing a few of the more expensive pigments with cost-effective alternatives, this line delivers reliable performance at a smart price—without compromise. Rated good to excellent for permanence, Cotman is a solid choice for students, hobbyists, or any artist seeking vibrant, dependable color at great value.

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.

Ultramarine [Blue]

Pigment code
PB29
Type
inorganic
Chemical name
complex silicate of sodium and aluminum with sulfur
Chemical formula
Na8-10Al6Si6O24S2-4 or Na6-8Al6Si6O24S2-4
Properties
Ultramarine is the standard warm blue, a brilliant blue pigment that has the most purple and least green in its undertone. It has a moderate to high tinting strength and a beautiful transparency. Synthetic Ultramarine is not as vivid a blue as natural Ultramarine. Ultramarine dries slowly in oil and tends to produce clean, though granular, washes in watercolor. French Ultramarine mixes well with Alizarin colors in oil and watercolor form to create a range of purples and violets. It can dull when mixed with white in acrylic form, but mixes well with other colors. The shade varies based on manufacturer. Considered a great color for glazes, it is not suitable for frescoing.
Permanence
Ultramarine has excellent permanence, although synthetic Ultramarine is not as permanent as natural Ultramarine. It may discolor if exposed to acid because of its sulfuric content.
Toxicity
Ultramarine has no significant hazards.
History
The name for this pigment comes from the Middle Latin ultra, meaning beyond, and mare, meaning sea, because it was imported from Asia to Europe by sea. It is a prominent component of lapis lazuli and was used on Asian temples starting in the 6th century. It was one of the most expensive pigments in 16th century Europe, worth twice its weight in gold, and so was used sparingly and when commissions were larger. Ultramarine is currently imitated by a process invented in France in 1826 by Jean Baptiste Guimet, making blue affordable to artists and extending the range of colors on their palettes.
Description
Artificial Ultramarine, French Blue, French Ultramarine, Gmelin's Blue, Guimet's Blue, Permanent Blue, Royal Blue, Synthetic Ultramarine. New Blue describes particular shades of Ultramarine. Armenian Blue and Lazuline Blue are names for genuine Lapiz Ultramarine. Sky Blue is a pale tone of Ultramarine.

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