Half-mourning dress, 1855-65 (ca 1860-63?), from the North Carolina Museum of History. This dress would have been worn after a woman had been in "full mourning" for, typically, around a year. During "half mourning" she would have been allowed to wear more color-- like purple and white-- and also to go out more often and participate more widely in her community.
Half-Mourning Dress: 1872-74, American, silk. "This half mourning dress shows the care with which additional colors were implemented in mourning attire with the white accents carefully placed to not overwhelm the black and create a visually appealing transitional garment."