To make a long story short, the left footbed (beneath the inner sole) contains an embedded plastic ring, into which one can insert a microchip for iPodding while running.
This princess quickly felt the pea (had no idea that my two-day-old shoe came with such a feature) and, after my initial crankiness, removed the offending ring with a butter knife, whittled down some irritating arch support, took some anti-inflammatories, and, happily, find myself mobile again.
I would call these "dove" grey.
Always looking for some irony, or, at least, a little coincidence, I remembered that I had seen a new Prada shoe ad for Spring 2012 that showed some hot feet:
And his wings, in turn recalled Henry James' devastating novel The Wings of the Dove:
In the 1997 film version, Charlotte Rampling wears some of the most gorgeous Poirot-inspired clothes:
Tomorrow I shall decide whether my running shoes are propelled by flames or feathers.