Some politicos are born servile, others have servility thrust upon them.The Pantone Color Institute, which normally finds itself in the news exactly once a year, when it proclaims the “color of the year” — 2015’s is marsala — last week heralded the christening of a new color: “Minion Yellow,” named for the rascally henchmen who assist Gru in the “Despicable Me” films. Apparently, the proprietary-color world is trolling the political world. This is the Age of Minions. Practically all colors have symbolic associations, and yellow’s baggage is ugly and complicated: The yellow-bellied are cowards; yellow journalism is dishonest and irresponsible;...