Green Haze. Painting by Karla Wozniak.
Found here (via here).
Someone made awesome color tests at the Rietveld screen-printing lab.
Oh, and I’m om Instagram.

This exuberant binding of Modern French Painters (1929) conveys some of the excitement surrounding the dissemination of modern art in the early 20th century. Writing at a time when modern art could provoke intense debate, author Jan Gordon intended “to put into plainly intelligible language the ideas behind and the developments of…’Modern Art.’ I wished that my readers should understand what I was saying, even if they did not agree with me.” Reflecting on the dynamism of the movement, he concluded, “If the public can assimilate all that it has recently received, it will be able to assimilate all that it will receive for a century or so.” - jt
Windy – Fallen Fruit from Frisland. Painting by John Kørner.
Found here.
Lots of challenges. 
Screenprint by Boyoun Kim.
Found here.
By Irena Tuwim & Monika Halunak (2010).
Found here.
Rosy Fingered Dawn at Louse Point (1963).
Painting by Willem de Kooning.
I returned to look at the real thing at the Stedelijk Museum in Amsterdam yesterday. It is hard to do justice to the colors here.
Image scanned from Willem de Kooning – The North Atlantic Light 1960-1983, published by Stedelijk Museum Amsterdam, 1983.
Antrapyreen Kristallen. 
Photopgraph from De Wereld van de Chemie, published by Het Spectrum n.v., Utrecht/Antwerpen (1968).
Found here.
Portrait of Roger Avermaete (1919).Painting by Jan Cockx.
Found here.
Red Devil Color Chart No. 1 (1963). Painting by Jim Dine.
Found here.
Introduction to The Theory of Probability and Statistics.Book cover design by Colangelo Studios (1966).
Found here.
De maat der jaren. Painting by Erik Mattijssen.
Found here.
Pattern by Alexander Girard for Herman Miller (1964).
Found here.