This page contains information regarding Star Trek: Discovery, and thus may contain spoilers.
In 2266, all decks reported green after being placed on alert. Lieutenant Dave Bailey on the bridge asked phaser station two "Where's your green light?" during a battle simulation while Captain James T. Kirk and Doctor McCoy listened in. (TOS: "The Corbomite Maneuver")
In 2268, while on the planet 892-IV, Captain James T. Kirk contacted the Enterprise with the message "Condition green, all's well." This was a pre-arranged code term used by landing parties of the USS Enterprise when communicating under duress. It indicated that while the party was in trouble, the ranking officer aboard ship was not to intervene or send anyone to help, as this would only endanger more people. It did not prevent that officer from preparing for possible future actions. Neither did it prevent that officer from using considered judgment to exploit an opportunity that aided the party without violating mission parameters. (TOS: "Bread and Circuses")
In 2364, Deanna Troi reported that "The board shows green, captain. All go." before the USS Enterprise-D attempted to outrun Q on the ship's first mission to Farpoint Station. (TNG: "Encounter at Farpoint")
|Colored alerts:||Red • Double Red • Yellow • Blue • Gray • Black • Green|
|General alerts:||Battle stations • "Brace for impact" • Emergency stations • General quarters|
|Battle • Evacuation • Fire • Intruder • Perimeter • Proximity • Security • Standby • Tactical • Visitor|
In "A Piece of Reaction", Commander Riker, under duress from the Sigma Iotians, told the computer on the holodeck to cancel a self-destruct sequence, adding "condition green" as his authorization code, prompting the computer to respond "Condition green acknowledged." This convinced his captors that the self-destruct sequence had been aborted, when in fact it was actually still running.