Question.

I feel stupid for even asking, but I can't for the life of me remember how I made these icons (with the underlying greens and blues in the shadows):



Help? I know it involved lots of layers, but what exactly I don't remember.

And while I'm here, how does one get vivid colour effects like these (with predominant colours)?

(by toastandtea)
(by call_me_daisy)

Much thanks in advance. :x