petals open enlightenment
beauty and rebirth
In Buddhism the lotus has much symbolism attached to it. The muddy murk that it grows in also is important as it symbolises the gaining of purification and faithfulness as those that rise above the muddy waters need to be faithful. It is also a symbol of fortune : a symbol of enlightenment and rebirth.
The pink colour represents the history of Buddah, with the open bloom a symbol of enlightenment and self awareness. The mud teaches the value of choosing the right path over the easy one.
For the full symbolic meaning of the lotus flower http://buddhists.org/buddhist-symbols/the-meaning-of-the-lotus-flower-in-buddhism/