Maybe you can try a large swatch of the finalists and see what happens after a couple weeks. It depends on what color your "dirt" is. Your side yard is all paved so I don't really know that you would pick up much from the ground. The light stucco on my building bases did not seem to get too dirty. Some of the darker colors were darker than the actual dirt or airborne "soot" or whatever it is, and showed dirt more. Kind of like a dark car (or black pants to use your analogy)...So it depends on your local environment.

I am interested in exterior paint colors fo4 stucco home with light gray roof

I have pretty much the same layout. One story ranch-style Florida stucco home. I want to change the color. what did you finally decide on? did you get recommendations? Would love to see 'after' pics. : )

IMO san, tan and beige are all just shades of beige. You already have that so why not just do the garage door the same and do your aqua door