I don't think O'Reilly will change the Camel's color anymore. Though you know why, I'll write it for the others who might not: this blue is used for everything Perl they do (every book about Perl or close enough, like J. Friedl "Mastering Regular Expressions").

Fido is "Programming Perl", 2nd ed., while Amelia is "Programming Perl", 3rd ed.

There seem to be a problem with the work camel as well: Fido's colophon says it's a "camel (one hump dromedary)", while Amelia's colophon says exactly the opposite with "dromedary (one hump camel)". More inside jokes?