Mike and Daniel, thank you for the suggestions!

I requested browser vendor positions as well as reviews for chromestatus 
entry.

Mozilla: [css-color-adjust-1] Root non-overlay scrollbars used color scheme 
· Issue #995 · mozilla/standards-positions (github.com) 
<https://github.com/mozilla/standards-positions/issues/995>
WebKit: [css-color-adjust-1] Root non-overlay scrollbars used color scheme 
· Issue #326 · WebKit/standards-positions (github.com) 
<https://github.com/WebKit/standards-positions/issues/326>

I updated the chromestatus entry with these links as well.

On Monday, March 4, 2024 at 12:08:23 PM UTC-8 [email protected] wrote:

> Thanks for the summary of the experiment results on Edge - sounds positive.
>
> If this is purely a browser UI change, then we don't really need the 
> blink-dev process at all. However, if we're relying on concepts defined in 
> a CSSWG draft, and devs can change the outcome w/ some CSS (or maybe here, 
> the lack of CSS to result in non-`normal` computed value...) it would be if 
> there were interoperability in UI choices across browsers. I don't 
> necessarily think we should block on the outcome, but requesting vendor 
> positions could be useful.
>
> (and Daniel, if you scroll down a bit - I did ask about TAG and browser 
> signals. :))
> On 3/2/24 1:10 PM, Daniel Bratell wrote:
>
> Mike didn't refer to the TAG review or browser signals, but the review 
> steps in chromestatus. The intent should request, privacy, security, 
> enterprise, and the other steps there.
>
> I agree that this lives in the borderland between user agent UI and a web 
> visible change so some shortcuts might be possible to motivate, but you 
> still need to click the the appropriate buttons in the chromestatus tool.
>
> /Daniel
> On 2024-03-01 21:10, 'Yaroslav Shalivskyy' via blink-dev wrote:
>
> Hello Mike,
>
> Thank you for taking a look!
>
> I am seeking consensus on how to approach the feature from a 
> standardization perspective. I think the feature can be considered a 
> browser UI change, which is why I haven't requested a TAG review or 
> signals from other engines. However, I am open to doing so if necessary.
>
> I apologize for any confusion. We did the general experimentation in Edge 
> (not the "origin trials" as I mentioned in the email). Retention reports 
> were neutral, and we observed no regressions in scorecards. Also, we have 
> not received any negative user feedback thus far.
>
> I am working on requesting reviews for my chromestatus entry. Thanks for 
> pointing this out!
>
> Thanks,
> Yaroslav
>
> On Friday, March 1, 2024 at 5:52:55 AM UTC-8 [email protected] wrote:
>
>> Hi there,
>>
>>
>> Would you mind requesting reviews for the various review gates in your 
>> chromestatus entry?
>>
>>
>> On 2/29/24 4:12 PM, 'Yaroslav Shalivskyy' via blink-dev wrote:
>>
>> Contact emails 
>> [email protected], [email protected]
>>
>> Explainer 
>> None
>>
>> Specification 
>> https://www.w3.org/TR/css-color-adjust-1
>>
>> Summary 
>>
>> Makes the browser use the user's preferred color scheme to render the 
>> viewport scrollbars if the value of "page’s supported color schemes" is 
>> 'normal' or not specified, and the computed value of the color-scheme for 
>> the root element is 'normal'. Viewport scrollbars can be considered to be 
>> outside the web content. Therefore, the user agents should honor the user's 
>> preferred color scheme when rendering viewport scrollbars if page authors 
>> have not explicitly specified support for color schemes.
>>
>>
>> Blink component 
>> Blink>Layout>Scrollbars 
>> <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3ELayout%3EScrollbars>
>>
>> TAG review 
>> None
>>
>> TAG review status 
>> Not applicable
>>
>> Any reason you think this is N/A, or have you just not requested TAG 
>> review?
>>
>>
>> Risks 
>>
>> Interoperability and Compatibility 
>>
>> None
>>
>>
>> *Gecko*: No signal
>>
>> *WebKit*: No signal
>>
>> *Web developers*: No signals
>>
>> *Other signals*:
>>
>> Could we request signals please?
>>
>>
>> WebView application risks 
>>
>> *Does this intent deprecate or change behavior of existing APIs, such 
>> that it has potentially high risk for Android WebView-based applications?*
>>
>> None
>>
>>
>> Debuggability 
>>
>> None
>>
>>
>> Will this feature be supported on all six Blink platforms (Windows, Mac, 
>> Linux, ChromeOS, Android, and Android WebView)? 
>> Yes
>>
>> Is this feature fully tested by web-platform-tests 
>> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
>> ? 
>> No
>>
>> Flag name on chrome://flags 
>> None
>>
>> Finch feature name 
>> UsedColorSchemeRootScrollbars
>>
>> Requires code in //chrome? 
>> False
>>
>> Tracking bug 
>> https://issues.chromium.org/issues/40259909
>>
>> Measurement 
>> Added a use counter UsedColorSchemeRootScrollbarsDark. The counter tracks 
>> the number of users who have dark mode root scrollbars due to the feature. 
>> Adoption in Edge Stable population based on this metric is approximately 
>> 13%.
>>
>> Availability expectation 
>> Initially available in Chromium browsers.
>>
>> Adoption expectation 
>> This feature immediately affects specific use cases upon launch.
>>
>> Adoption plan 
>> This feature has been through origin trials on Edge. Other browsers adopt 
>> this feature to fix specific use cases.
>>
>> Any details or feedback you can share from the Origin Trial?
>>
>>
>> Non-OSS dependencies 
>>
>> *Does the feature depend on any code or APIs outside the Chromium open 
>> source repository and its open-source dependencies to function?*
>> No.
>>
>> Estimated milestones 
>>
>> Shipping on desktop
>> 124
>> DevTrial on desktop
>> 121
>>
>>
>> Anticipated spec changes 
>>
>> *Open questions about a feature may be a source of future web compat or 
>> interop issues. Please list open issues (e.g. links to known github issues 
>> in the project for the feature specification) whose resolution may 
>> introduce web compat/interop risk (e.g., changing to naming or structure of 
>> the API in a non-backward-compatible way).*
>> None
>>
>> Link to entry on the Chrome Platform Status 
>> https://chromestatus.com/feature/5089486318075904
>>
>> Links to previous Intent discussions 
>> Intent to prototype: 
>> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/PH8PR00MB16366CA3D32D8ECE2C646C54A94D2%40PH8PR00MB1636.namprd00.prod.outlook.com
>>
>> This intent message was generated by Chrome Platform Status 
>> <https://chromestatus.com/>.
>>
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