That military green (or gardener green, whatever)...actually contrasts quite well against the red, white and blue of the flags. It made her stand out and yet....blend.
I was imagining other colors against that background and fear that white would have made her “pop” too much...red would have blended with the flags, pink or yellow might have been nice but maybe too close to the red/white stripes. I never would have thought of that color but it made her hair look gorgeous, her face youthful and worked perfectly against the background.