Photos and videos
Jun 13
Why do transparent yellow materials often become reddish when they're thickly layered or concentrated?
Bright yellow transparent materials transmit the long and middle wavelengths of light strongly and the short wavelengths much more weakly. Suppose a transparent yellow layer...
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Jun 13
of the light transmitted, and that these changes resulted from progressive removal of spectral components in a process that would later be named "subtractive". In contrast, Goethe in his "Farbenlehre" of 1810 was content to classify the phenomenon as an instance of "Steigerung"..
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Jun 13
translated as "augmentation" by Eastlake, a tendency of both yellow and blue to "ascend" towards red that Goethe regarded as one of the most important appearances connected with his "doctrine" of colours.
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Some slides from my online National Art School course “Beyond ‘Colour Theory’: Understanding and Applying Colour”. Our next term is coming up on Mondays 6-9 pm from April 20 or Fridays 10 am - 1 pm AEST (Thursday evening in Nth/Sth America) from April 24. ....
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Arthur Pope was a Harvard art professor and colour theorist who developed a conceptual colour order system adapted from that of his teacher, Munsell’s friend and rival Denman Ross, and discussed how this framework could be used to paint effects of light and atmosphere. ...
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Pope recognized that many scientists of his time were confusing the concepts of saturation and chroma. The simple digital colour space or “model” HSB (or HSV) aligns with Pope’s framework of saturation and brilliance, making it easy to apply his principles in digital painting.
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Feb 23
Looking forward to discussing colour constancy on Wednesday at the 4th "Colour Turn" Colour Research Colloquium, Feb 25, 12:00 – approx. 16:00 (CET / UTC 1, Berlin time). Each presentation is 15 minutes followed by 30 minutes Q&A(!). Register by email at submission@colourturn.net
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21 Nov 2025
This is a short extract on what I call the colour-photo model of colour perception from my talk "The Apparent Physicality of Colour" given at Colour Matrix Sydney 2025. I've posted the rest at youtu.be/aEEgYVNRda4 and an illustrated pdf at academia.edu/145038315/The_A…
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21 Nov 2025
And some images from the same talk "The Apparent Physicality of Colour" given at Colour Matrix Sydney 2025. See the full presentation at youtu.be/aEEgYVNRda4 and an illustrated pdf at academia.edu/145038315/The_A… pic.x.com/OYCfGfActd
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9 Nov 2025
What a great conference Colour Matrix Sydney 2025 was! Here are some photos of the presentations, discussion panels, tours, conference dinner, lighting installations, displays and exercises, and the impromptu conference rap party! Abstracts available at coloursociety.org.au/resourc…
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15 Oct 2025
Four more presentations from "Colour Matrix Sydney 2025", all from our session on Colour in Art and Art Materials on Oct 31 - Nov 2. Registration for online and one-, two- or three-day in-person attendance is closing soon at coloursociety.org.au/event-5…
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2 Oct 2025
Four more in-person presentations at the Colour Society of Australia national conference "Colour Matrix Sydney 2025" on Oct 31 to Nov 2. Details and bookings for online and in-person attendance at coloursociety.org.au/event-6…
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19 Sep 2025
Here's a new addition to the 500 slides for my colour online Public Programs course at the National Art School, Sydney. It illustrates metamerism and metameric breakdown using an illustration on the back cover of Rolf Kuehni's 1983 book, "Color: Essence and Logic". ...
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19 Sep 2025
The two printed areas, whose spectral reflectances are shown, almost match under some light sources but look very different under others.
For course details see sites.google.com/site/djcbri…, and to enrol go to shop.nas.edu.au/collections/…
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19 Sep 2025
Of the three sessions this term the Monday PM and Thursday day classes are full and almost full, and the third class on Tues 6-9 pm AEDT needs just a few more to run. Not sure when cutoff is, so enrol ASAP if you're interested! Suits time zones throughout Europe, Africa and Asia.
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