Yet it is this very palpability within a landscape that makes many people believe that the Parthenon sculptures should be viewed, not in the grey light of their London vault, but within direct view of the location for which they were created.
And yes, she is working on another book but, at least for now, not one featuring Christian Grey.
With so much to play for, it is not surprising that the grey market has become a lawyer's paradise.
But her rubbish doesn't fit in one grey bin, not by any means.
Vince Cable told us we are facing "the moral equivalent of war" and admitted he could see only grey skies, not sunny uplands.
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But the run-down, grey blocks did not remain vacant for long.
And whether licensed or not, nearly all the grey market firms place orders with mobile phone component companies that work with major manufacturers as well, which keeps factories up and running especially as handset sales plummet amidst the economic downturn.
That may not put the men in the grey mackintoshes out of business, but it could cramp their style.
Dr O'Donoghue said the "Essex lion", which had been described as tawny, could not be a wildcat, which had grey and black stripes.
But not everyone agrees that barriers to the grey-market are unjustified.
We know this not only by the strange, shiny grey appearance of the sandstone - caused by centuries of polishing by human skin - but also by the fluent lines of Aboriginal art on the overhanging rock face beside me.
He could not have been more unlike the dull, grey-suited types in most British boardrooms.
While Labour was having problems with the grey vote, the Tories could not rest easy either.
Because it meant a slight decrease in the rate of increase of Social Security payments, and the grey-haired voting cohorts could not be offended.
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As the central bank tightened credit in 2010 and 2011, desperate borrowers drew too heavily on grey finance, taking loans they could not repay.
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There are enough grey areas in the historical record - not to mention events hidden behind official secrecy rules - to keep historians arguing for centuries about how precisely the Cold War was won.
Just metres away from where the coffin was discovered was something else which, if dug up in the garden, would probably be thrown away - a squashed, grey pot, hand-moulded, not made on a wheel, and with a crude decoration of lines and punch-marks.
Like many Moscow apartments, it did not look much from the outside - a heavy, grey-steel security door, a scruffy communal entrance hall, a grand old staircase with a cast-iron banister spoiled by multiple layers of shiny, off-blue institutional paint.
Michelle McIlveen of the DUP referred to the importance of Strangford as a breeding ground for common and grey seals, and said the assembly should not underestimate the importance of the mussel beds as a filtration system and as a nursery for other species.
The idea for its commercial, however, may not be one cooked up by E-Trade ad agency Grey Group.
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It was said Ms Knowles noticed her drink did not taste right and when pouring away the coffee spotted a grey sludge in the sink.
The TG concluded that the IPCC should not follow (or, enforce) the procedures for evaluating grey literature that had been on the books as official IPCC policy for more than a decade.
Baroness Grey-Thompson said at her local supermarket she could not get from a blue badge parking space to the doors - 20m is not that far, she said.
Each case is decided on its merits and there are grey areas in the law which can allow parents who have not followed the correct procedures to keep the adopted child.
I'm not sure I ever thought of stoves coming in a shade other than grey or white, but full marks to the PR for ingenuity and for compelling me to write about a color I have had a burgeoning appreciation for since becoming a refugee from black some three years ago.
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Another grey area is beefing up anti-terror laws: experts are not sure whether India needs new laws.
Grey Thompson also told BBC Radio 5 Live that although she would not impose her views on other members of the panel, she believes there should be a stiff punishment for drug-taking.
Although Baghdad's grey skyline is dotted with blue domes and tiled minarets, there is not enough room for the new devout.
It might not look full of promise but a lot of hope is hanging on a big grey box at a Cornwall wind farm.
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