Add PandaBattalion's Potion Effect Colors

Plast Pack have red color for negative potions and green for positive potions. Panderp's pack has specific colors for each potion! 

His [resource pack](https://oc.tc/forums/topics/52169a89af7fb0b138000323)
[Image](http://i.imgur.com/qJqwQAq.png) of the potion colors.