int getLedColor() {
        String hex = null;

        if (getLed() instanceof String) hex = (String) getLed();
        if (getLed() instanceof JSONArray) hex = ((JSONArray) getLed()).optString(0);
        if (getLed() instanceof JSONObject) hex = ((JSONObject) getLed()).optString("color");

        if (hex == null) return 0;

        try {
            return Integer.parseInt(hexWithoutHash(hex), 16) + 0xFF000000;
        } catch (NumberFormatException e) {
            e.printStackTrace();
        }

        return 0;
    }
Only prior to Android 8. The notification color for LED.
src/android/Options.java