:: COMPARE ::
The short answer
A red flag is a reason to slow down or leave; a green flag is a reason to move closer. The important difference is that green flags are things a person actively does — not simply the absence of alarming behaviour.
Side by side
| Aspect | Green flag | Red flag |
|---|---|---|
| Tells you to | Proceed | Stop |
| Is | A trait present | A behaviour to fear |
| Age of the term | Recent | Mid-1700s |
| Example | Apologises properly | Never apologises |
What each one means
Literally, a green flag is the one waved in motor racing to start or restart a race. In dating it's a trait or behaviour that signals someone is emotionally healthy and worth moving toward — accountability, clear communication, steadiness. It's the inverse of a red flag, and it's a presence rather than an absence.
Full definition of Green Flag →The contrast above sets out how Red flag differs from Green Flag on the points that actually matter.