Turquoise Acid A water main on the street in San Francisco while Automattic waited to go into a restaurant. I think that’s Matt in the background, but it might have been Alex too. Urban Acid applied to this image
Except where stated in the post, photos posted on or after January 1st, 2014 are licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. Basically, do what you like with those images but always credit Donncha Ó Caoimh as the author and link here. You'll also have to license the photo under the same license.