Of the shirts in Emily's closet, 1/6 are blue and another 1/6 are indigo. What fraction of the shirts are either blue or indigo?

The fraction of the shirts that are blue or indigo is 1/6 + 1/6 = 2/6. Simplifying 2/6, we get 1/3. Therefore, 1/3 of the shirts in Emily's closet are either blue or indigo.