The Color blind gamer (via Waxy) posted here for my red-green colorblind husband. Sometimes regular board games are a problem too. I believe if the original selection of red for “stop” and green for “go” (theorized in wikipedia to have originated from nautical right-of-way starboard/port lights) had been vetted by just 10-20 males and changed, we’d be much better off today with the indicators on most electronic devices.