Support `toolbarColor`

[aeharding]

@capacitor/browser has toolbarColor. This is nice so you can set the color so it matches your app's theme. I would really like it to also be supported in @capacitor/inappbrowser

Thanks for the great plugin!

[dontwan]

I would also like this feature, so I took a look at the code of OSInAppBrowserLib-Android, which this package relies on. While the library itself doesn’t directly support custom modifications, the CustomTabsIntent.Builder does provide options for modifying colors, but these are marked as deprecated:

For example:

• setToolbarColor
• setNavigationBarColor
• setNavigationBarColor
• setSecondaryToolbarColor