There are 2 context in app. Native and WebView
Native Context is developed using Android Native API's
WebView Context is chromless web browser running inside app
You cannot extract element styling using appium in Native Context.
You can extract element styling using appium in WebView Context since element is displayed inside app using webrowser.
So if u r element is in native context ans is NO
And if u r element is in webview context ans is Yes. How (using getCssValue() api of selenium which returns rgba value associated wit color)
By default when u launch app it is NATIVE context.