Such was the brilliance of J. M. W. Turner's colors that many artists dreaded having their works hung near his at exhibitions. Sir Thomas Lawrence, finding Turner's "Cologne" hanging between two of his portraits, complained so vociferously that his colleague kindly dulled down the painting's golden sky.
"What have you done to your picture?" a friend cried in horror at the change.
"Well, poor Lawrence was so unhappy," Turner replied. "It's only lampblack. It'll all wash off after the exhibition."