A horse of a different color
Meaning
Something entirely different or a separate and distinct matter from what is currently being discussed.
Origin
Shakespeare's "Twelfth Night" features the phrase "a horse of that color," used by Maria to describe Malvolio's puritanical character, meaning "of the same kind" or "of that ilk." However, the modern idiom "a horse of a different color," emphasizing distinction and a completely separate matter, truly gained widespread traction in the 19th century, particularly in American English. It likely evolved from the common practice of distinguishing horses by their coat color, which often indicated breed, lineage, or purpose. A horse of a different color wouldn't merely be distinct in appearance but also in its very nature or function, thus becoming a vivid metaphor for something entirely unrelated to the current topic.
Examples
- I thought we were discussing budgeting, but your proposal about marketing is a horse of a different color entirely.
- While your idea for the party theme is interesting, it's a horse of a different color than what the client requested.