In lines 57-59 of "How It Feels to Be Colored Me," what exactly does Hurston mean when she says, "No brown specter pulls up a chair beside me when...

In lines 57-59 of "How It Feels to Be Colored Me," Hurston makes a reference to a "brown specter" and a "dark ghost."  A specter is another word for ghost or some other supernatural apparition.  In the context of the essay, Hurston personifies these supernatural elements to speak figuratively about people of color who have been oppressed by whites.  She says that these ghosts come back to remind whites of their role in racial oppression.  After her reference to the ghosts, she says that "[t]he position of [her]white neighbor is much more difficult."  She means that it is easier to be a person of color in America because people of color are not guilty of racially oppressing other people.  Hurston figuratively suggests that white people must contend with the brown ghosts of the past who show up to remind them of their crimes.  So, Hurston personifies the "brown specter"  and the "dark ghost" to suggest that the past can never be forgotten.