What is blue grass?

Famous quotes containing the words blue and/or grass:

    “Debussy—A pretty girl with one blue eye and one brown one.”
    —H.L. (Henry Lewis)

    “All the heavy days are over;
    Leave the body’s coloured pride
    Underneath the grass and clover,
    With the feet laid side by side.”
    —William Butler Yeats (1865–1939)