While the Nexus 5X had an LCD panel to the Nexus 6P’s AMOLED screen, this time both Pixel phones get the AMOLED treatment. As a result, the screen on the Pixel displays the same sort of over-saturation that we experienced with the XL.
If you dig that bolder-than-real-life AMOLED effect, feel free to leave things just as they are, but as we recently pointed out, tucked away in developer settings for both Pixel phones you’ll find a setting to switch the display over to an sRGB color space, resulting in much more accurate colors.