MacOS – Unable to reset Google Chrome theme

tldr; When I reset my Google Chrome theme to default, and restart my browser, the title/tab bars take on a dark theme and I can't figure out why. I think there is some kind of hidden settings/profile location I can't find

I'm on macOS Mojave 10.14.5, using Google Chrome latest (currently Version 74.0.3729.169 (Official Build) (64-bit)) and I'm having an issue where, for my main user profile, no matter what I do I can't seem to reset Chrome to it's default theme/styling. It always appears as a dark titlebar & tabs

I'm not running macOS dark mode at all (for Chrome, or by default). I'm looking for some other suggestions on what I can do to get the titlebar to display "normal" again (light mode), because I've tried everything I can think of.

My title bar shows up as below:

The default, however, is supposed to show up as below:

I can can get my titlebar to show up like it's supposed to, by doing:

• Going to the theme store & installing a theme
• Going into Chrome settings, and choosing "Reset theme"

However, this only persists until the next time I restart Google Chrome.

This only occurs on my personal laptop, it doesn't occur on other computers I'm using that I've synced my Google Preferences to.

Other things I've tried:

• Signing out of my Google Chrome sync
• Completely deleting & reinstalling Google Chrome and attempting to delete all of the related preferences & settings files
  • And everything chrome-related in ~/Library/Preferences
• Toggling macOS dark mode off & on again
• Using defaults write com.google.Chrome NSRequiresAquaSystemAppearance -bool Yes (and trying it w/ No & resetting to default)
• Deleting the folder with all the Google Apps
• Using the "reset settings to their original defaults" setting in Chrome
• Deleting ~/Library/Preferences/com.google.Chrome.plist
• Deleting ~/Library/WebKit/com.google.Chrome
• Deleting Chrome with AppCleaner (which found some referenced folders in /var/ and other locations)
• Disabling GPU acceleration
• Deleting everything Google related from all locations in all the directories noted here
• Creating a new Chrome profile
• Resetting all chrome://flags to default
• Trying Google Chrome Canary (it also inherits this dark theme/style)
• Disabling dark mode on mobile Chrome (even though this shouldn't matter, because I've tried disabling sync previously, and deleting & reinstalling chrome and all associated folders I can find while disconnected from the internet)
• Running the cleaning & optimization scripts via Onyx
• Running the cleaning & optimization scripts from Clean My Mac. Deleting using the Clean My Mac uninstaller
• Resetting settings under advanced option in Google Chrome
• Restarting Chrome & rebooting my computer after trying all of the above

I created another profile on this computer, logged in, and started Google Chrome and it worked as expected/desired (light tabs). For the life of me, I can't figure out what I may have missed on my profile that could be interfering with the title bar/tab color.

I've also tried toggling dark mode while Chrome is open; the theme changes between modes but it still has a dark looking theme when in light mode (per the screenshot above). It's like there's a theme persisted that I can't rid of

I'v found a workaround (using a theme that mirrors the default) but at this point I'm interested in determining the root cause, without completely nuking my profile.

I'm at a loss of what the cause could be so any other suggestions on how I can troubleshoot or triage are appreciated.