How to change colors in the popup when running Show-Command (or Get-Help -ShowWindow) in PowerShell?

[Windows 11]

In Windows 11 I selected one of the standard dark themes. But when I'm in PowerShell 5.1, and either type Show-Command, or Get-Help (or the help alias) with the -ShowWindow option, the resulting popup is still a blinding white with black text. How do I configure the colors on these popups (permanent setting so I don't have to change it each time)?Both Bing and Google AI faceplanted (as usual) but it seems some things can be set in the Registry, others in the file referred to in $PROFILE. But that's as far as I got.

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