If ya want your Defender's Banner back to normal.
1. Put it in your ox bag.
2. Put ox bag back on ox
3. Take ox bag off ox
4. Take Defenders Banner out of ox bag
5. The colouring should now be back to normal
I did this with Beli's Defender's Banner and it worked without taking any abilities from the flag. It restored the colour back to the original only
Masterjack