From The Collaborative International Dictionary of English v.0.48:
Sandy \Sand"y\, a. [Compar. Sandier; superl. Sandiest.] [AS.
sandig.]
1. Consisting of, abounding with, or resembling, sand; full
of sand; covered or sprinkled with sand; as, a sandy
desert, road, or soil.
[1913 Webster]
2. Of the color of sand; of a light yellowish red color; as,
sandy hair.
[1913 Webster]