In pictures: The rainbow of sports venues!

You’re a billionaire. You love tennis. So you make it a point to hold a tennis tournament … on blue clay.

Yeah, the color contrast ticks off the world’s elite tennis players, who tried to win this week's Madrid Open. But that didn't prevent the peacock impulses of Romanian billionaire Ion Tiriac from adding another venue into the rainbow of stadiums to feature wacky hues in odd places.

Enjoy! Or don't, if you've got sensitive eyes.

Red: The football field turf at Eastern Washington University.

Orange: The checkerboard end zones of the Tennessee Volunteers.

Yellow: Fields of sunflowers during the Tour de France.

Green: Fenway Park’s Green Monster.

Blue: That clay at Madrid.

Purple: The Wrigley Field board, repainted for Northwestern football.

And, because why not …

White: As in, football fields covered with snow.