The Weekender: 10.16.15

 The City is Yours: Some of New York City's most storied buildings open up their doors to the public this weekend only for Open House New York. | Open House New York |

Day In, Day Out: Bill Cunningham's ever-present blue utility jacket is almost as recognizable as his affable grin and Nikon camera. How to get his look, via our friends at MR PORTER. | MR PORTER |

Traces of Blue: From Vermeer to Yves Klein, a brief history of ultramarine's place in art history. | The Paris Review |

Beyond the Deep Blue: Why Pluto sees blue in its sky. | NPR |