There is no site. The internal list is restricted for distribution. If you like an old color, just google it to see the render but there is very little chance you will see a real representation unless you are ready to visit the Exclusive Mnaufaktur atelier where you will see real palette. 
The alternative is you invent your color and PAG will send a sample before proceeding to production. 

Good luck and try your best to visit exclusive!

 


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GT Lover, Porsche fan

991.2 GT3 manual

Cayenne GTS 2014