Engine Colors Need Help

I have read that some people say they were red and some say Blue! I have seen them both ways in vehicles also. I have seen a few professionally restored and some owner restored cars and most are blue in color. I have searched the internet and find blue and in some cases red. I have been told by many people that blue for a 69 dart 340 is the way they came from the Factory. So I am leaning toward the original factory color,I just want to see a real Black car with the blue engine. I have seen all colors except Black.