Originally Posted by
dkc192
What is the aircraft and seating configuration (e.g., 1-2-1 or 2-4-2)? It's possible that UA is still loading the domestic 772HD (with 2-4-2 seating up front) on certain routes way in the future; I think those seats might be colored orange on the seatmaps shown in the app and on the website (as opposed to dark blue for true Polaris 1-2-1 seats).
This is the correct answer, with one addition -- the 2-2-2 787 layout is also orange.
Regardless of the plane:
Orange squares are recliners.
Non-square orange seat icons are previous generation lie-flat seats that do not offer direct aisle access to each seat.
Blue seat icons are Polaris seats with direct aisle access to each seat.