lettuce green
/ˌlɛtɪs ˈɡriːn/noun
1A medium shade of green resembling that of lettuce.
2 North American. In plural Salad greens.
adjective
Usually with hyphen. Of a medium green colour resembling that of lettuce.
Origin
Mid 19th century; earliest use found in Edinburgh New Philosophical Journal. From lettuce + green.