Blog 25 : Colour matters

Colours with the same name – don’t be fooled!

A little bit of advice today. Never rely on one manufacturers pigment being exactly the same as another brand, even if it has the same name.

Quinacridone Gold is one example of this anomaly. Winsor & Newton Quinacridone Gold is made with index numbers PY150, PR206 and PV19 but the Sennelier version uses PY150, PR206 and PR101 and Daniel Smith, to further confuse, is made with PY150 and PO48. All three brands will look different when painted due to this.

Quin Golds by Sennelier, Winsor & Newton and Daniel Smith

All brands have the bright PY150  yellow pigment. This is the same pigment used in Transparent Yellow. The Winsor & Newton version is definitely a more muted colour than the Sennelier version and the Daniel Smith one is quite different again. 

Let’s look at the colour index numbers first. These are the index numbers for all three brands. Winsor & Newton: PY150 is a bright yellow, PV19 is a cool magenta, PR206 is a red/brown. Sennelier: PY150 and PR101 a reddish terracotta, a little like Burnt Sienna. Daniel Smith: PY150 and PO48 a burnt orange. 

Here is an analogy of the index numbers within these three pigments.

Winsor & Newton: PY150 (yellow) + PR206 (red/brown) + PV19 (cool magenta like Permanent Rose and Permanent Magenta) – the spike of magenta makes this version more muted because PV19 is cool and very near to the violet/blue spectrum. When red/brown, yellow and the violet biased magenta are mixed we get a golden beige/brown. The magenta makes this mix a more muted gold with a slight brown bias.

Sennelier: PY150 (yellow) + PR206 (red/brown) + PR101 (terracotta/burnt sienna) – the warmth of this mix is due to red index colours being of the same warmth and bias. It is only slightly muted and more golden than the Winsor & Newton version as there is no violet or cool bias.

Daniel Smith: This version of Quinacridone Gold is made with PO48 and PY150. PO48 is a burnt orange tone. This is a warm and brighter version due to no violet or red/brown influence. 

Quinacridone Gold is a colour which sings out in this autumn subjects like this magnolia leaf below!

So when you are selecting new pigments, always check the index numbers. Single index numbers are best for mixing but occasionally you will find a colour with two or even three, like Quinacridone Gold. When mixing with pigments of more than one index number, be aware not to add too many other pigments to it. A maximum of three index numbers mixed together are best for vibrance. Quinacridone Gold is already a muted colour by having three index numbers, so adding more index numbers to it will just mute it even further to brown.

For everything you need to know about colour mixing theory and application techniques see my book below which will be available to purchase next year in March 2021.

Until then, happy painting!


Watercolour Mixing Techniques for Botanical Artists

Published by The Crowood Press

A practical guide to accurate watercolour mixing with primaries for botanical artists
Colour mixing is a key skill for the botanical artist. In this practical guide, Jackie Isard explains how to observe and use colour accurately. She shows artists how to make informed choices when selecting pigments, as well as how to learn about colour mixing and its application.
• Gives detailed instruction and advice on understanding colour and pigments
• Explains how to ‘see’ colour and tricky mixes, from greens and reds to the difficult botanical greys
• Includes advanced colour application techniques – colour enhancement, shadow colours and colour temperature transition
• Step-by-step guides illustrate how to paint with layers, how to use underlaying colours to enhance, and colour and fine detailing

Order online via book shops or Amazon. I will announce it’s arrival on Facebook or via email if you have joined my website mail-list www.jibotanicals.co.uk. Please note, preorders will be available online soon. E-books will also be available.


Online courses for botanical artists:
•  Mixing Watercolour Accurately for Botanical
•  Fine Details and Finishing Techniques
For more information and course outlines see my website at:
www.jibotanicals.co.uk


NEW MINI-BOOK for beginner botanical artists being launched soon. Order from me direct when it is announced on Facebook or via email if you have joined my website mail-list www.jibotanicals.co.uk. Please note, no preorders are being taken at present.

The Little Book of Watercolour
for Beginner Botanical Artists

A very useful little guide for beginner botanical artists wishing to learn how to use watercolour and their painting materials.
• Water and pigment balance 
• Brush types and uses 
• Using a palette
• Exercises to improve brush skills 
• Useful painting techniques

This self published mini-book will be available to purchase at the beginning of December 2020. I will be announcing it on Facebook and via my website mail list when it is ready www.jibotanicals.co.uk. Please note, no preorders are being taken at present.

2 thoughts on “Blog 25 : Colour matters

    1. Hi Candice! That’s great. My larger book will be online for preorder. I’m not sure when. It has been seen on Amazon and Waterstone’s already but no preorder link yet. Keep a look out!

      Like

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