Eventually the guardians allow Hal Jordan to return to Earth alone (where he just was), leaving an entire planet of Lanterns on Oa to do...whatever it is they do when a single Lantern goes off to fight something
Once you’ve died to one of the above, go to the middle of the Ferry of the Damned and hold out your lantern. When standing near the Well of Fate, choose the “take flame” option to change your lantern’s color. With the light claimed, you can now change the lantern colors of yo...