If your spring has been light on slightly academic explorations of sadness, sex, and rage, then On the Boards has your back with its season closer, the unfinished BLUE, RED, WHITE triptych by Ligia Lewis. Sorrow Swag examines "race, authorship, gender, and grief" through the figure of a white, male boxer in a blue room. His lines are a mishmash of playwright Jean Anouilh's Antigone (Sophocles's great defense of civil disobedience) and Samuel Beckett's Not I (a freaky-ass, manic monologue delivered in almost total darkness by an actor whose entire body has been painted black, except for the mouth). The show should bust up any lingering notion you have about the stability of identity. Recommended pairing: minor matter, the second show in Lewis's tryptic. For this one, Lewis drops two dancers in a pool of red lights and lets them duke out their "urges of love and rage." by Rich Smith