Well, it depends: If your friend wants something dark-er, than blue, then I would pick purple. While blue can be a sort of brighter color for certain situations.
A.) Professional and Amateur
Answer:
Although no instrumental parts are preserved in the notation, a number of instruments are mentioned in the play: Robin plays a silver flageolet, Huars a musette, Boudon and Gautier the tambourin and the comamuse au grand bourdon, and two other have horns.