1966 Barracuda Rear Trim

Hi guys, i have 66 Barracuda and i am wondering about the rear trim where the fish is. Is it supposed to be surrounder by a blu background. There is a guy on ebay selling item # 150427039576 that has them. I just want to know if the background is actually suposed to be blue as mine is not. Any info or pics of yours would be great.

Thanks
ROb