Splash screen icon and color in Flutter

First, create a file at the location - android/app/src/main/res/values/colors.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
  <color name="bg_color">#6023e0</color>
</resources>

Edit the code in the file - android/app/src/main/res/drawable/launch_background.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Modify this file to customize your launch splash screen -->
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@color/bg_color" />

    <!-- You can insert your own image assets here -->
    <!-- <item>
        <bitmap
            android:gravity="center"
            android:src="@mipmap/launch_image" />
    </item> -->
</layer-list>

For Android API Level 21 or higher

If you are using Android API level 21 or higher, Also make the changes in drawable-v21/launch_background.xml.