uwp 亚克力色调颜色黑色出现深灰色

Question

In my uwp app I am trying to use the Acrylic Brush, I made a custom one because the default ones are not working for me. But if you notice here I have attached image from Microsoft docs and on right side is window of my app showing acrylic completely different on same background.

Code

 <AcrylicBrush
                            x:Key="AppBackgroundAcrylicBrush"
                            BackgroundSource="HostBackdrop"
                            FallbackColor="Black"
                            TintColor="Black"
                            TintLuminosityOpacity="0.1"
                            TintOpacity="1" />

After that I tried luminosity to be 0.9 and now it looks dark grayish. But I want it to look jet black color Acrylic with small transparency. Basically I want it to look like as the image shows on left side as in Microsoft docs with 10% luminosity and 100% tint opacity.

Code

   <AcrylicBrush
                            x:Key="AppBackgroundAcrylicBrush"
                            BackgroundSource="HostBackdrop"
                            FallbackColor="Black"
                            TintColor="Black"
                            TintLuminosityOpacity="0.9"
                            TintOpacity="1" />

Docs: https://docs.microsoft.com/en-us/windows/uwp/design/style/acrylic

Answer 1

Basically I want it to look like as the image showson left side as in microsoft docs with 10% luminosity and 100 % tint opacity.

Update

Base on the testing, TintLuminosityOpacity 0.9 and TintOpacity 1.0 could render you mentioned jet black color AcrylicBrush . But that is not conformity with document. And the AcrylicBrush looks dark gray. It is strange, I will report to related team. Currently, please try use the following to replace.

<AcrylicBrush
    x:Key="CustomAcrylicBrush"
    BackgroundSource="Backdrop"
    FallbackColor="Black"
    TintColor="Black"
    TintLuminosityOpacity="1.0"
    TintOpacity="1"
    />