Could be rooted to  Issue 847024 .

Does disabling hardware acceleration(chrome://settings page) or setting #force-color-profile to sRGB(chrome://flags) resolves the issue for you? 

#1: Tried both options, that makes no difference.

We are both talking about the Windows title bar, right? The thing with the minimize, maximize and exit buttons? Because I don't immediately see how Chrome's render settings would affect that (that said, I'm not familiar with how Chrome handles the title bar. I'd assume it's a OS feature but I guess it's possible that Chrome handles it?)

And just to reiterate/clearify, the "normal" Chrome window is working fine. It's the panels that show this behaviour.

Thank you for providing more feedback. Adding the requester to the cc list.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

chemo.b@ Thanks for the update.

Tested this issue on Windows 10 on the reported version 68.0.3440.75 and the latest Canary 70.0.3503.0 by following the below steps.

1. Launched Chrome and installed Hangouts.
2. In Windows settings, set the color to seafoam and can observe that the Hangouts Title bar is Grey and the same behavior is observed on M-67 builds.
Attached are the screen shots for reference.

Request you to check and confirm if anything is missed from our end in triaging the issue.

Thanks..

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Hmm I'm definitely seeing a dark title bar on M67 (screenshot)

But even if that's just my particular set up, isn't it weird that Chrome's panel windows don't respect the color the user configured? 

In your case the Hangouts' title bar should be seafoam.

Btw, I'm also seeing this grey color bar on the following:
- Pushbullet (extension) pop out
- Dev tools pop out (when inspecting remote devices)

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Thank you for providing more feedback. Adding the requester to the cc list.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

chemo.b@ Thanks for the update.

Retried the issue on Windows 10 on the reported version 68.0.3440.75 and the latest Canary 70.0.3503.0 and unable to reproduce the issue.

Set the Windows Color to 'Storm' and the same color is observed on Hangouts title bar on M-67 and M-68 chrome builds. No darker title bar is observed on M-67 build.
Attached are the screen shots for reference.

As this issue is not reproducible at TE end, adding 'UI>Browser' component and requesting the team to look into the issue and help in further triaging.

Thanks..

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As per comment #7, removing the 'Needs-Bisect' label, adding 'Platform>Extensions' component and CC'ing ccameron@ and requesting for help in further triaging the of issue, as this issue is not reproducible at TE end.

Thanks..

Gentle Ping...

@ccameron@: please have a look into it for further triaging this.

Thanks.!

This isn't related to color space, but rather to platform themes. Please send to Windows team to take a look.

As we are unable to reproduce the issue from our end hence adding TE-NeedsTriageHelp to move this out of Unconfirmed triaging bucket. Also, tentatively adding UI>Browser>Themes component so that this can be routed to respective team for help in further triaging of this.

Thanks.!

**UI mass Triage**

We were unable to reproduce this bug. If this bug still reproduces for you, please reopen or file a new issue. 

Thanks..