It seems some newborns have blue eyes even if later they take on other hues.  Colour is one of the most slippery elements to describe, so I like this reference and had fun choosing the photo.

‘A blueness as deep as a new-born eye.’

See also a quote-rich mosaic review of this magnificent, entrancing book: a love letter to islands and a paean to the sea. 

Source: Adam Nicolson, Sea Room: An Island Life (London: Harper Collins, 2013 (2002)), p. 130

Photo credit: Mindy Olson P at unsplash.com