如何在 flutter 中更改 FCM 通知 colors？

Question

There is no any code to change the colors of notification bar from white to red(for eg).

Answer 1

Try looking at this

Customize default notification

Custom default icon

Setting a custom default icon allows you to specify what icon is used for notification messages if no icon is set in the notification payload. Also use the custom default icon to set the icon used by notification messages sent from the Firebase console. If no custom default icon is set and no icon is set in the notification payload, the application icon (rendered in white) is used.

Custom default Color

You can also define what color is used with your notification. Different android versions use this settings in different ways: Android < N use this as background color for the icon. Android >= N use this to color the icon and the app name.