What specific color combination is noted by enthusiasts as an especially rare or 'one-of-a-kind' example?
Answer
Chocolate Tabby
The Chocolate Tabby, a mix of deep brown base color overlaid with tabby markings, has been highlighted within the Devon Rex community as an especially rare example.

Related Questions
What are the instantly recognizable physical traits of the Devon Rex?How is the absolute rarity of a color in a recognized cat breed often determined?How many different color and pattern classifications does the Cat Fanciers' Association (CFA) accept for the Devon Rex breed?What specific color combination is noted by enthusiasts as an especially rare or 'one-of-a-kind' example?What primary goal often influences breeder priorities away from producing specific rare colors?What color results from the dilution of the primary color black in a Devon Rex?What strategy is recommended for prospective owners seeking a less common Devon Rex color?Which tabby patterns are listed as variations within the Devon Rex breed?Why is a dilute color like Blue inherently less common than its non-dilute counterpart like Black?When does a poorly defined tabby pattern on a common color become undesirable to a breeder?