The chosen typography uses Shackleton, a modern twist on a roman serif. Given that topophilia has its roots in Ancient Greek, it felt apropos to subtly tie the font back to that time period. Magnesium MVB provides a solid sans-serif with some visual intrigue in the weight of some of its stems. Acumin Variable Concept can be used sparingly and complements the other two with its thinner width.
The colors chosen were meant to play on the American red, white, and blue, but with a softer hue on each. This felt right given the history of Philadelphia in the founding of the country, but different enough that it stands on its own without coming too close to the American flag palette.