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.’
Source: Adam Nicolson, Sea Room: An Island Life (London: Harper Collins, 2013 (2002)), p. 130
Photo credit: Mindy Olson P at unsplash.com