Jay, As the owner of a 2021 Antimatter Blue Mustang I can say it is very hard to get a good picture showing the true metalic blue. 80% of the time the car will appear black. you need a bright sunny day to have the color pop. I love the color.
When I had my 2014, I installed a California Special wing on it. Looked great in my opinion. I know it's not an S550, but I was told I couldn't install one on my S197. Surprise, it works and looks good too. P.S. I did drill holes in the decklid.