Why did William Faulkner want different colors of type in The Sound and the Fury?

William Faulkner wanted to use different colors of type in the section of his novel The Sound and the Fury narrated by Benjy to make the text "simpler" for the reader.1

Because Benjy’s narrative shifts frequently between different points in time, Faulkner believed that using colored ink would help distinguish these temporal transitions. Although he proposed this idea to his publisher prior to the book's 1929 release, he was told it was not possible at the time. The concept was eventually realized in 2012, when the Folio Society published a limited edition of the novel featuring the multicolored text Faulkner had originally envisioned.1