This is my own lantern corps and story:
Color:Blurple
Emotion:Joy
Oath:
In blackest night, in brightest day,
Our joyful lantern leads our way.
And if you doubt us, hear us say,
“We will prove you wrong, okay!?”
Origin:
The joker stopped being a villain. Now he just sold laughing gas all over the universe, but his goons started experimenting on other emotional gases. So, their first try was “joy gas”, a huge success. They were shipping it to Ogatoo(Larfleeze wanted it) but there was something wrong with the ship transporting it. The ship broke in half, the half with the gas landing on Sector 3152’s planet Agarukk. It landed in a village that happened to have a green lantern in it, Alan Scott. He and the village members started feeling elated and joyful. Also, Alan’s ring turned blurple.
Being the only lantern there, the village members elected Alan leader of the newly-created Blurple lantern corps. The villagers joined as well.
Also, after the joy gas ‘accident’, the Joker decided not to try out any more gases.