This is all I could find on Allpar
"Dodge Challenger gets a new Plum Crazy (possibly Detonator Yellow) color late in the year, and the five-speed automatic replaces the four-speed. The long-rumored 6.4 liter engine may finally show up for SRT, perhaps midyear; if it does, expect it in Charger SRT, 300C SRT, etc. One anonymous source claims Hemi Orange has been dropped."