I updated Chrome to version 68.0.3440.75 (Official Build) (64-bit) just the other day and found that my browser windows had the background color change from white to a washed out looking pink. At first I thought it was a monitor issue, but other browsers and applications looked fine.
I tried a few things to fix it, including changed chrome settings by going to “chrome://flags/#
Turns out what fixed it was to disable hardware acceleration! Not sure why the new version of Chrome handles that differently, the setting was the same on the older version. But in any case, to turn it off, go to “settings”, scroll to the bottom and click “Advanced”, then towards the end under “System” you can turn off hardware acceleration.