I found myself wondering just what shade of green is glaucous, and learning that it is either ‘a dull greyish-green or blue’, or a ‘pale greyish or bluish’ and also refers to being covered in a powdery bloom as on grapes. A fine alliterative colour combination, in any case.
‘Then a glaucous-green field of grain still quite low.’ 22 July 1860
Source: Henry David Thoreau, The Journal 1837-1861, Damion Searls (ed.), preface by John R. Stilgoe (New York: New York Review Books, 2009), p. 625