Starts with a purple logo and stops at white screen

10-11  Source: Network gathering  Views:1 

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When i opened my gmail account my mac screen went blue and i had to force shut down it. Then when i restarted it the apple logo was purple and then a white screen appeared after a few seconds and stopped booting. I faced the same problem while restarting again. When i tried to open disk utilities section the screen went whole blue again. Same thing happened when i tried safe boot the screen went blue. what should i do. please someone help me.
Start with SMC and PRAM reset:
http://support.apple.com/kb/ht3964
http://support.apple.com/kb/ht1379
Boot into the recovery partition (Hold the OPTION key at startup).  From the 4 option menu, select Disk Utility.  Then select Disk Utility>First Aid and run Verify and repair.
Any Change?
Ciao.
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