I Passed for White (1960)

Biracial but light-skinned, Angelena Bernice Lee, quite often mistaken for being white, is shunned by both white and Black people after it's discovered that she is biracial. Although she embraces her heritage, against her Black grandmother's advice to live life truthfully, Bernice heads to New York to start fresh under the assumed name Lila Brownell. Almost immediately she meets and attracts the interest of Rick Leyton, who is from a prominent white New England family. After thinking long and hard about it, she accepts his marriage proposal, believing that their love for each other will see them through. Confiding only in her one true New York friend, Sally Roberts, a Caucasian, Lila builds a proverbial house of cards made up of half-truths and complete lies that has the potential to come crashing down around her.