Is Celie presented as being ultimately liberated at the end of the novel?

I think that Celie is ultimately liberated largely through the character of Shug Avery. She exudes life and brightens up the world around her. When she arrives at Albert’s home, she is wearing a red wool dress, and when she sings at Harpo’s, Celie describes her outfit as "a skintight red dress look like the straps made out of two pieces of thread." The old dress she gives Celie for her quilt is a sunny yellow color. Shug brings color and opportunity to the people she meets. She brings Celie and Albert love, she brings Harpo income, she inspires others to sing, and she brings entertainment to all her fans.