It has been originated from a man who loves blueberries and drinking.
Creator: "Hey man, I'm gonna get my Drink On with this."
Drinkinkg Buddy: "What's that?"
Creator: "It's 1/3 Southern Comfort, 1/3 Blueberry Schnapps, and 1/3 Blueberry Oolong Tea.....I'm gonna call it an Indigo Morio- named after my genius."
Drinking Buddy: "You're crazy."
*Two hours later....*
Drunk Drinking Buddy: "Yo man, hand me more Indigo Morio, that stuff is amazing."
Creator: "Here you go my disciple."
*Party contiues gloriously*