TabView contrast is worse in ControlsV2

[zadjii-msft]

Describe the bug

Filed on behalf of microsoft/terminal#12398. Using Terminal 1.13.10333.0

When updating to Controlsv2, the contrast between the active TabViewItem and the TabView background is basically indistinguishable. Qualitatively, the dark theme contrast seems more obvious in the Terminal, but the light theme difference is almost entirely unnoticable.

We don't have an a11y bug on us yet for this, but I suspect we will soon.

Steps to reproduce the bug

Add a TabView to an application

Expected behavior

Contrast between the tabs and the tabview background to be more distinct. Presumably we shouldn't need to style the tabs more to achieve a obvious distinction of which tab is active.

(I'm aware that the text on the focused tab is bolded, but that's an effect that's pretty subtle: )

Screenshots

Controlsv1, for reference:

NuGet package version

Microsoft.UI.Xaml 2.7.0

Windows app type

• Win32 & Xaml Islands

Device form factor

Desktop

Windows version

Insider Build (xxxxx), May 2021 Update (19043)

Additional context

No response

[github-actions]

This issue is stale because it has been open 180 days with no activity. Remove stale label or comment or this will be closed in 5 days.

[zadjii-msft]

I maintain that this is still an issue. The default contrast ratio is just plain bad, and not everyone can easily adopt the pair of Mica experiences to increase contrast.