I'm sorry, but as written this is simply wrong - the colors on the Pixel 2 XL are far closer to accurate than they are on almost all other default Android OLED screens. This was confirmed by the sites that actually measured them with spectrophotometers (even Vlad Savov's piece for The Verge admitted that their color calibration tech indicated they were accurate, Vlad just didn't like them).
Now, if you and your wife have an aesthetic preference for over-saturated colors that's totally fine - my wife does too in fact, and she'd be happier with the screen of her Pixel 1 for that reason. But the Pixel 2 XL colors are not "off", they are showing the colors as they were created originally on color calibrated screens in the first place.
In point of fact you can replicate the colors of the Pixel 2 XL screen very closely by switching to non-default settings in other phones, including the sRGB setting on the Nexus 6p or first gen Pixels (currently removed if you've installed the 8.1 beta), or use the "Basic" setting on Samsung phones, but for those products it was felt that many people prefer oversaturated screens, so they don't make accurate color the default setting (this is also true of TVs in showrooms - TVs are notorious for being overly bright and overly saturated on display, because people gravitate to them in side-by-side comparisons).
I'm not trying to criticize your preference - what you like is what you like, and that's fine. I think it makes sense for Google to offer more choices of screen color tuning (as they are now). But "accurate color" means something pretty specific to those who have to do color management, and you don't get to hijack the term just because you prefer inaccurate colors.