Rufous ( //) is a color that may be described as reddish- brown or brownish- red, as of rust or oxidised iron.  The first recorded use of rufous as a color name in English was in 1782.  However, the color is also recorded earlier in 1527 as a diagnostic urine color. 
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- "Color Me Rufous". 10,000 Birds. 19 January 2007. Retrieved 21 June 2018.
- Maerz and Paul A Dictionary of Color New York:1930 McGraw-Hill Page 203; Color Sample of Rufous: Page 45 Plate 10 Color Sample A10
- Anon., Here begineth the seinge of urynes. London, 1527; British Museum.
- Department, United States War (1858). Reports of Explorations and Surveys: To Ascertain the Most Practicable and Economical Route for a Railroad from the Mississippi River to the Pacific Ocean. A.O.P. Nicholson, Printer.