The Collaborative International Dictionary
Sea green
Sea green \Sea" green`\ The green color of sea water.
Wiktionary
sea green
a. Of a blue-green colour, mostly green. n. A blue-green colour, mostly green.
WordNet
sea green
n. the property of a moderate green color resembling the waters of the sea
Usage examples of "sea green".
He hadn't told her that he, too, could have described Gwen, down to the sea green of her eyes and the curve of her cheek.