On the TV Guide listings grid, certain types of programs are color coded: movies are red, sports are green, everything else is blue. The listings for World Series of Poker are shown in blue, not green.
(Can't say as I share GH's disdain for poker on TV, though. Since I started playing, I have found I'll sit and watch every hand of a two-hour poker tourney. If you'd told me three years ago that I'd ever do such a thing, I'd have thought you were crazy.)