I had dinner last night with my friends S and E, who are in the throes of painting their new flat. We had a lovely meal including purple kale, which turned its cooking water a brilliant peacock blue. We all agreed it was a shame to throw this away; S suggested using it to tint the white paint and make their walls more interesting.
"Yes," I said, "you could call it A WHITER SHADE OF KALE!"
It may be a while before I'm invited to dinner again.