Pacific Science Center

Bringing science to life.

Since the 1962 Seattle World’s Fair, Pacific Science Center’s arches have been a familiar part of the Seattle skyline. Designed by Minoru Yamasaki, our white arches rise above a court of reflecting pools. At night, they light up the sky with their vibrant colors – green for St. Patrick’s day, orange for Halloween and many more. Pacific Science Center is proud to support many local organizations and national causes by changing the color of the arches to correspond with special events and awareness months.

We are currently unable to light the arches in support of outside organizations or national causes as our lighting system is broken. At this time, we are unable to repair the system, but will update this page when our arches are able to be lit again. If you have questions, please email