Continuity mistake: After Harpo and Sophia are married, Harpo leans in to kiss Sophia but she is whisked away by relatives and he turns away. In the next shot we get a side view of Harpo and he is still leaning in to kiss her after he had already turned away in the previous shot. (00:38:35)
Continuity mistake: When Celie is combing Shug Avery's hair while she is in the tub, you see Albert creeping up the stairs looking to see what is going on. In the background you hear his father shouting at the house, wondering if anyone is home. At the time Albert is at the top of the stairs he is wearing a reddish shirt. The next shot shows him walking out the door to meet his father, but now he is wearing a green shirt. (00:55:00)
Continuity mistake: The letters that spell "sky" on the piece of waxed paper change throughout the whole movie.
Continuity mistake: When Mister asks for Nettie and is told he can have Celie, Celie and Nettie are watching from behind him through a window on which a window lock is obvious. When the camera shows him on the porch, there is only an opened door behind him and no window. (00:08:15)
Continuity mistake: When he first brings Celie home to his family, Mister'shouse is a two-story plantation-style house with grand pillars, a front porch that does not span the whole width of the house and and an upper porch. Then, suddenly, his house is a farm-style house with a full-width front porch, and a full garden in front (the one with the mailbox across the dirt road from the house) and it's completely different from the first house.