For years, Sharon High School parents had help finding their sons and daughters among the sea of gowns on graduation day: boys all sported deep maroon, while girls wore pristine white. But last year, students approached principal Jose Libano with a proposal: end the tradition, which alienated some students. Now, all graduates wear maroon. Around the region, longstanding customs of assigning graduation colors by sex are giving way to new realities, driven by transgender student activists and supportive educators and classmates of all stripes. The change reflects a growing awareness that simple categories of male and female do not fit...