On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 73 on 2019-03-12 Note: Chrome uses the color only on installed progressive web apps. Chrome reports support, but does not actually use the color anywhere.
In Chrome Android version 92 on 2021-07-20 Note: Chrome for Android does not use the color on devices with native dark mode enabled unless it's an installed progressive web app or a trusted web activity.
In Edge version 79 on 2020-01-15 Note: Edge uses the color only on installed progressive web apps.
Not in Firefox
Not in Firefox for Android
Not in Internet Explorer
In Quest Browser version 17.0 on 2021-09-13 Note: Chrome for Android does not use the color on devices with native dark mode enabled unless it's an installed progressive web app or a trusted web activity.
Not in Opera
Not in Opera Android
In Safari version 15 on 2021-09-20
In Safari on iOS version 15 on 2021-09-20
In Samsung Internet version 6.2 on 2017-10-26
Not in WebView Android
In WebView on iOS version 15 on 2021-09-20