Read the following context and answer the question.
Context: It turned the water very deep indigo . When several more rinses failed to show a decrease in the amount of dye loss , I tried a vinegar rinse . That water came up clear , so assuming the problem was arrested , I got one more pan of cool water to rinse some of the vinegar smell from the shawl .
Question: Why was the narrator using vinegar ?
Answer:


To deal with issues with color in clothing .