The base of the Palace will be marble and granite; the rest, tufa, a purple-red volcanic stone found in the Caucasus.
For La Rotonda (opposite) built near Vicenza, the roof tiles were soaked in the dregs of winevats to give them a special and pleasing purple-red richness.
And the colored gels can be mixed and matched, so you can choose a yellow-green combination to energize you in the kitchen or a purple-red to get things started in the bedroom.