Diego shares his latest project a WP8 bluetooth RGB LED controller with pic12f1572 16bit pwm in the forum: I made a Bluetooth board card with a pic12f1572, this pic can drive 3 output pwm at 16bit. Project files are available at Github. Via the forum.
This application note from Microchip demonstrates color mixing using the PIC12F1572 MCU (PDF!): This application note demonstrates color mixing using the PIC12F1572 processor. The PIC12F1572 processor features three 16-bit pulse-width modulators (PWMs), among other peripherals. The 16-bit PWMs allow precise control over each RGB LED, allowing smooth transitions even at low-brightness/luminosity levels.