The phrase "aesthetic qualities" refers to the characteristics or features that make something appealing or visually pleasing to someone's senses or judgment. Full definition
Window treatment refers to the basic arrangement of colors, furniture, and other complementary elements that could set the tone of aesthetic quality of a window. (apcconcept.com)
Not just for functionality and placement, but for aesthetic quality. (slashgear.com)
The result is a harmonious overall picture — a composition of high aesthetic quality. (topspeed.com)