Cobalt (Aureolin) Yellow

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Cobalt (Aureolin) Yellow – Professional Handmade Watercolour Paint

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

Also Known As: Aureolin, Cobalt Yellow

Learn how we craft our finest professional watercolours

Description

Cobalt (Aureolin) Yellow is a luminous, transparent yellow watercolour pigment with a cool, slightly greenish undertone. Its radiant, airy quality makes it perfect for painting sunlight, spring foliage, luminous reflections, and bright highlights. Known for its clarity and brilliance, this pigment brings light and vibrancy to watercolour compositions without overwhelming surrounding colours.

This semi-transparent yellow performs beautifully in glazing techniques, allowing you to build layers of glowing washes while maintaining a clean, fresh feel. It mixes exceptionally well with blues to produce vivid greens, or with reds and oranges for natural, sunlit tones — ideal for landscapes, botanical works, and atmospheric effects like sunrises or glowing clouds.

Though it is rated with AA lightfastness (very good), Cobalt (Aureolin) Yellow may show slight fading over time in certain conditions. Nevertheless, its beautiful clarity, versatility, and subtle coolness make it a much-loved pigment for artists seeking a transparent yellow that enhances the vibrancy and realism of their work.

We Recommend

Use distilled water with our handmade watercolours to preserve the purity and vibrancy of each pigment.

Have any questions? Please feel free to reach out — we’re always happy to help.

Jackman’s Professional Watercolours are designed for artists of all levels — from curious beginners to seasoned professionals who value quality and lightfast, artist-grade materials.

Product Information

Attribute Value
Pigment Potassium Cobaltinitrite
Pigment C.I. Number PY 40
Series 3
Lightfastness AA (Very Good)
Opacity Semi-Transparent
Granulation None
Staining Non-Staining
Hazardous Type Prop 65
Regulatory & Safety Information
California Proposition 65 Notice: California law requires us to provide the following notice: This product contains Cobalt & DMDMH (a preservative that can release small amounts of formaldehyde). These substances are on California's Proposition 65 list of chemicals known to the state to cause cancer when exposure exceeds very strict limits. Our watercolours remain safe for normal artist use. Learn more at www.P65Warnings.ca.gov.

Customer Reviews

Based on 7 reviews
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M
Martin L
Aureolin

Aureolin (cobalt yellow) - not quite as acidic or cool as I would have hoped but nonetheless a top quality, pigment-rich paint, as usual.

V
Vanetta Meardon
Cobalt yellow

Gorgeous

T
Timothy Collier

Cobalt (Aureolin) Yellow

M
Martin L
Great addition...

Despite it's acidic appearance, this is a beautiful, rich, smooth and very well pigmented paint that lays perfectly, as one has come to expect from this excellent range.
Cool and sherbert lemon-like, great for botanical applications and light washes. Perfect for mixing cool greens.

S
Stephen Bracebridge
Great value

The service and guidance is the best. The watercolour is of good quality and is value for money.


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