Believe it or not, but a friend managed to procure two copies of "Colour. Travels Through the Paintbox" although he ordered them after I did. Now, there seem to be none again (grrr, Amazon!). He was magnanimous enough to give me one of them, however, and my nose has been stuck in it ever since. The first chapter is devoted to ochre and takes us to the Central Desert of Australia where, for example, one Gloria Petyarre experiments with line and color, becoming so abstract that her optical effects have evoked comparison to Bridget Reilly.
In 2001 and 2004, the Sammlung Essl presented two huge Dreamtime exhibitions which I was too ignorant to visit, and therefore now must settle for googling: