Purple is traditionally associated with International Women’s Day.
The association comes largely from the women’s suffrage movement, especially the Women’s Social and Political Union in Britain. The organization used purple, green, and white from the early 1900s; purple represented loyalty and dignity, green symbolized hope, and white was associated with purity or solidarity.
Purple became the most recognizable single color linked with International Women’s Day and modern feminist activism. It appears in clothing, campaign graphics, public lighting, posters, and charity events around March 8.
A common oversimplification is saying purple is the only official color. Green and white also have historical ties to the suffrage movement, and different organizations may use additional colors. Still, among the choices given, purple is the standard answer.