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, Aureolin (Cobalt Yellow)

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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

Pigment Cobalt (Aureolin) Yellow
Pigment C.I. Number PY 40
Series 3
Lightfastness AA (Very Good)
Opacity Semi-Transparent
Granulation None
Staining Non-Staining

Customer Reviews

Based on 5 reviews
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T
Timothy Collier

Cobalt (Aureolin) Yellow

M
Martin Larkin
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.

B
Bev Butler
Lovely fresh colour

This was one of the first Jackmans colours I've tried and I was impressed.
It is a gorgeous fresh yellow, perfect for spring flowers.
The paint is good quality and I found it easy to use (I'm a beginner)

L
Lizzy
Beautiful colour

A lovely colour! The order came in today, and I have only swatched the colours I bought (6), but they all rewet well and are well pigmented. This cobalt yellow is a beautiful soft yellow and a very nice addition to the more regular yellows I have..


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