public int getColor() {
        String androidColor = options.optString("androidColor", null);
        
        if (androidColor == null) return NotificationCompat.COLOR_DEFAULT;

        try {
            // Remove leading hash from hex, convert to int, add alpha channel
            return Integer.parseInt(hexWithoutHash(androidColor), 16) + 0xFF000000;
        } catch (NumberFormatException exception) {
            Log.e(TAG, "Could not parse androidColor hex to int: " + androidColor, exception);
            return NotificationCompat.COLOR_DEFAULT;
        }
    }
The notification background color for the small icon.
Defaults to {@link NotificationCompat.COLOR_DEFAULT} if not set or invalid.
src/android/Options.java