Untitled (Color/Colour) (2013), two torn out book pages, double wooden frame, 31 × 44.2 cm/12.2 × 17.4 inches.

Pages taken from Rolf G. Kuehni, Color. An Introduction to Practice and Principles. A Wiley-Interscience Publication. John Wiley & Sons, Inc., New York/Chichester/Brisbane/Toronto/Singapore/Weiheim (c) 1997, p. [i]; and Rudolf Steiner, Colour. Twelve Lectures by Rüdolf Steiner. Translated by John Salter and Pauline Wehrle. Rudolf Steiner Press, East Sussex. Reprint 2005 (1st thus 1992), p. [I].