To Polarize or not to Polarize? Examples Showing Effect on Color Balance
A high quality polarizer with uniform spectral transmission should in and of itself cause little change in color balance, particularly those made with the very best polarization foils, such as from Breakthrough Photography (most polarizers use generic decades-old stuff which is not so great).
However, particularly at high altitudes, the polarization effect is not confined to cutting glare or darkening the sky—a polarizer can radically affect the color balance.
In Making Sharp Images, I’ve added to my discussion of polarizer usage:
Making Sharp Images: Polarizer Impact on Color Balance
Includes two examples, each with toggle between MIN/MAX polarization, with striking differences.