“Summer fog. It leached all color and substance from the world, leaving only grays. Lead gray tombstone gray cobweb gray ash gray snot gray dust gray corpse gray. It was unheard-of that there be fog at this time of the year, late August. So it had to be another portent — as dire a one as the death of the One-Handed Warrior. There were many who said that the fog had its origin in the supercooled ashes of the hero: each molecule of his scattered body accreting water vapor, each tiny relic drawing to itself the air's own tears to fashion this wide-spreading shroud over the Many-Colored Land.”

(version in original Dutch / citaat van Bilders' brief, in het Nederlands:) ..niet minder bemin ik toch de graauwe wateren van mijn Holland, hunne ernstige, eenigsinds droeve kleur, die zoo goed overeenkomt met de even grijze luchten en dampen, dier er overeen hangen.
as cited in The land of Mauve: utopia or a reality? / Het land van Mauve: utopie of werkelijkheid? https://www.rug.nl/research/kenniscentrumlandschap/mscripties/christina_vlasma-het_land_van_mauve-masterscriptie.pdf; master-scriptie by Christina van Staats-Vlasma; Rijksuniversiteit Groningen, La Broquerie, Manitoba Canada, Nov. 2010, p. 97
undated quotes

Source: The Book Thief

Donald Judd (1974), as quoted in: Joseph J. Rishel et al. (2009) Cézanne and beyond. p. 94: Talking about the work of Cezanne.
1970s

Source: The Fresco (2000), Chapter 12, p. 125

Source: Don Quixote de la Mancha (1605–1615), Part II (1615), Book III, Ch. 33.

Vor einem grauen Haupte sollst du aufstehen!
Über den Umgang mit Menschen (1788)

Source: In Hospital (1908), p. 20