A number of points must be made in order to answer this question. There is important background information relating to this answer also.
Potential suitors speak or attempt to speak with the young women.
If a young woman stops grinding to speak with her visitor, her mother steps into the grinding room in order to see to whom her daughter is speaking. If the mother approves of the young man, he may be invited in for a visit, if not, he is sent away. Young Hopi men often hoped to win the hearts of young ladies based on their performances in races and trained accordingly. The film, because of time and budget constraints, did not go into detail about all the colors. In Hopi songs, poetic references are made to the directions in terms of the colors, or in terms of objects or plants or animals of a certain color.