React-native-screens: Change backgroundColor of the card behind a modal

[Kinark]

When a modal pops up, the behind content dims (gets darker/less opacity), however, if we are working on a dark themed app (with a black bg), the background should turn to gray when a modal pops up (notice the grayish card in the back).

when working with a black background and the modal pops up, the result is something like this:

As you can see, the card in the back is completely gone.

Is it possible to do such thing with createNativeStackNavigator?

[WoLewicki]

Can you provide a repo/snack with minimal configuration needed to reproduce the issue so I can work on it?

[WoLewicki]

Also, I am afraid that this grayish color comes from the usage of the system colors introduced in iOS 13. It is probably dynamic .systemBackground color for an elevated layer. (check 10:00 here https://developer.apple.com/videos/play/wwdc2019/808). In react-native you can use this color with PlatformColor. Applying https://github.com/facebook/react-native/blob/master/RNTester/js/examples/PlatformColor/PlatformColorExample.js#L60 to your headerStyle's backgroundColor will result in this effect in dark mode. Can I help you any more with this issue?

[Kinark]

Also, I am afraid that this grayish color comes from the usage of the system colors introduced in iOS 13. It is probably dynamic .systemBackground color for an elevated layer. (check 10:00 here https://developer.apple.com/videos/play/wwdc2019/808). In react-native you can use this color with PlatformColor. Applying https://github.com/facebook/react-native/blob/master/RNTester/js/examples/PlatformColor/PlatformColorExample.js#L60 to your headerStyle's backgroundColor will result in this effect in dark mode. Can I help you any more with this issue?

But if I apply a fixed backgroundColor to my headerStyle, I'll get a static gray header even when it's in first plan. What I want to achieve is a 100% black background that turns gray when in second plan.

Take a look at this native app:
NativeApp.zip

[Kinark]

Oh, nevermind. It worked just perfect :D

Thanks, @WoLewicki!!!