Product Disclaimer:
After one or two PE laps around the soccer field, or even just one morning waiting for the school bus in that soggy, ant-infested patch of grass at the end of the street, the color may quickly shift from green with envy to green with stomach discomfort, nausea, and yesterday's "mexican pizza" cafeteria lunch special.
I am thinking dark blue would work better on the space white. The space white is a baby blue, grey, or white. All of those usually match with dark blue colors. At least in my opinion. So some type of navy blue.
A grabber blue might work as well, but I am not sure.
Auto Design, the source of the Mach E side stripes I and others have purchased, has what I would call a Royal Blue color option. The sample color on their website is a bit lighter than the same color contained in their color brochure. They may be able to put a sample piece of the material in the mail to you. Never hurts to ask. The quality of the decals look very good. https://autodesign.shop/products/ma...-for-ford-mustang-2021?variant=39340357288034