Merge pull request fluttercommunity#487 from HaoCherHong/chore/readme…

…-background-color-ios

add `background_color_ios` description to README.md

README.md

@@ -114,6 +114,7 @@ be used to fill out the background of the adaptive icon.
   - `icon/path/here.png`: This will generate a new launcher icons for the platform with the name you specify, without removing the old default existing Flutter launcher icon.
 - `image_path_ios`: The location of the icon image file specific for iOS platform (optional - if not defined then the image_path is used)
 - `remove_alpha_ios`: Removes alpha channel for IOS icons
+- `background_color_ios`: The color (in the format "#RRGGBB") to be used as the background when removing the alpha channel. It is used only when the `remove_alpha_ios` property is set to true. (optional - if not defined then `#ffffff` is used)
 
 ### Web
 

example/default_example/pubspec.yaml

@@ -23,6 +23,7 @@ flutter_launcher_icons:
   adaptive_icon_foreground: "assets/images/icon-foreground-432x432.png" # only available for Android 8.0 devices and above
   min_sdk_android: 21 # android min sdk min:16, default 21
   remove_alpha_ios: true
+  background_color_ios: "#ffffff"
   web:
     generate: true
     image_path: "assets/images/icon-1024x1024.png"