Don't go overboard looking for them because most of those recipes aren't going to be of much use to you. Might be able to make decent money on swiftness potion, but things like discolored healing potions are utterly useless.
I learned Discolored Healing Potion through a quest in Silver Pine Forest. I find this recipe very useful for myself. I've been going through a lot of them lately. As a lvl 14 Warlock I am getting experience killing the mobs who drop one of the ingredients anyway so why not do the quest if you are hoarde?