Daily Life Walnut Creek Help Solve the Downtown Walnut Creek Flag Mystery April 6, 2016 10:00 am From a reader: I’ve seen this flag outside this establishment (across from the [Walnut Creek] library) — but I can’t figure out the significance of the colors. It’s blue and black. Any ideas? I wonder what the significance is, anyone know? Previous Post Yoppi Yogurt Closes in Ygnacio Plaza in Walnut Creek Next Post Support Natural Skincare Kickstarter Drifter Organics from Moraga