^"Convertor from RYB to RGB". PaintAssistant. Archived from the original on 28 June 2013. Retrieved 29 December 2012. RGB approximations of RYB tertiary colours, using cubic interpolation. The colours displayed here are substantially paler than the true colours a mixture of paints would produce.
^William T. Stearn. Botanical Latin. History, Grammar Syntax, Terminology and Vocabulary. Third edition, revised. David & Charles, Newton Abbot, London 1990
^E. Short, A. George. A Primer of Botanical Latin with Vocabulary. Cambridge University Press, 2013
^The Oxford English Dictionary (OED). Second Edition (20 Volume Set). Clarendon Press, 1989
^William J. Miskella, 1928, Practical Color Simplified: A Handbook on Lacquering, Enameling, Coloring And Painting; John Lemos, 1920, "Color Charts for the School Room", in School Arts, vol. 19, pp 580–584