If a wall failed design for the design case (wind shear, wind C&C, seismic, rigid diaphragm, or flexible diaphragm) shown on the screen, then the failing wall appears in red. The colour for a selected wall, which used to be red, is now orange. If a failing wall is selected, it appears as a darker shade of red.
A note at the bottom of the screen indicates that orange is for selected walls and red for failing walls. It also indicates the design case being shown on the screen.