Is there any way to set the website theme meta tag?

As you can see in the photo the top bar of the forum is white with dark mode set for the forum. Is there a way to set it to black/grey?

A cursory search lead me to this post where you can set a meta tag https://developer.apple.com/forums/thread/683403 but I’m not sure how much control you have over the forum given that it’s not custom.

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