BETA version -- 5.0.1002.182

[CY K]

Maybe you have enabled the option "User custom background color for web pages" in chrome://settings/cbBrowsing?
Please try resetting Settings in chrome://settings/reset
If the issue persists, you can try installing these two extensions in our safe mode(a command in Alt+F menu).

I solved the problem by resetting the "User custom background color for web pages" setting.

Thank you.