User report:
When viewing tabs that are currently open, the thumbnail shows the page with inverted colors. The color displays normally when opening the tab. I did not have Smart Invert enabled, but I tested turning the feature on and then disabling it again to see if that would make any difference. Unfortunately, I still got the same result when viewing open tabs. 

Test has so far not been able to repro.

Sean, please let us know here if future updates of iOS 11 resolve this issue.

App Information:
App Name: Google Chrome – The Fast and Secure Web Browser
App Version: 60.3112.39 (60.0.3112.39)
Installed App Version: 60.3112.39 (60.0.3112.39)

Device Information:
Device: iPhone9,3
iOS Version: 11.0
Language: en-US (English (United States))
Carrier: AT&T
Timezone: CDT
Architecture: N/A
Connection Status: WiFi
Paired Apple Watch: N/A

Screenshot: https://drive.google.com/file/d/0By4O1f2IQqQ_NXBsNEhfMXViR0JDejVCV1lYY0EyOHBKR0gw/view