Board Thread:General Discussion/@comment-26261153-20160118035903/@comment-6302057-20160213092659

Great theory, but the Curse appears black/grey and green for Regina and Snow, not purple and green.

I made my own theory back in December 2014 (seen the long theory here). There are clear reasons why each curse appears different. Essentially (in short form), the default colour is a black/grey cloud with green lightning seen for Evil Queen and Snow's Curses. Pan's Curse is plain green because the water in the well either strengthened the curse, removing the true love factor and rendering it unbreakable, or the Dark Curse takes on characteristics of its caster and Pan's appeared green due to this. The Curse takes characteristics of all of its casters (EQ's was violent and destructive, Snow's spread gently throughout EF). Hook's Curse is different as it was prepared in a completely different way: crushed heart in a cauldron of a random mixture that somehow created a Dark Curse.