Editing Fancy rat (section)

=== Coloring ===
While some pet rats retain the [[Agouti gene|agouti]] coloring of the wild brown rat (three tones on the same hair), others have solid colors (a single color on each hair), a trait derived from rats with black coats. Agouti-based colors include agouti, cinnamon, and fawn. Black-based colors include black, beige, blue, and chocolate.<ref name="ratgen" />

Eye color is considered a subset of coloring, and coat color definitions often include standards for the eyes, as many genes which control eye color will also affect the coat color or ''vice versa''. The [[American Fancy Rat and Mouse Association]] (AFRMA) lists black, pink, ruby, and [[Heterochromia iridum|odd-eyed]] (two differently colored eyes) as possible eye colors, depending on the variety of rat shown.<ref name=afrma-std /> ''Ruby'' refers to eyes which at a glance appear black, but on closer observation are a deep, dark red.

Color names can vary for more vaguely defined varieties, like lilac and fawn,<ref name="ratgen">{{cite web|url=http://afrma.org/ratgenpart3.htm|title=Rat Genetics, part 3|first=Nichole|last=Royer|publisher=AFRMA|access-date=9 January 2009}}</ref> while the interpretations of standards can fluctuate between (and even within) different countries or clubs.<ref name=afrma-std>{{cite web|url=http://afrma.org/fancyrm.htm|title=American Fancy Rat and Mouse Association standards|publisher=AFRMA|access-date=21 November 2006}}</ref><ref name=carol>{{cite book|title=Rats|last=Daly|first=Carol H.|url=https://archive.org/details/ratseverythingab00daly|url-access=registration|quote=international rat standard.|publisher=Barron's Educational Series|year=2002|isbn=978-0-7641-2012-1|edition=2|page=[https://archive.org/details/ratseverythingab00daly/page/15 15]}}</ref><ref name=nfrs-std>{{cite web|url=http://www.nfrs.org/varieties.html|title=National Fancy Rat Society standards|publisher=NFRS|access-date=21 November 2006|url-status=dead|archive-url=https://web.archive.org/web/20061209133238/http://www.nfrs.org/varieties.html|archive-date=9 December 2006}}</ref>
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