- The Sultan River is a river in Snohomish County in the U.S. state of Washington. It is a tributary of the Skykomish River, which it joins at the town of Sultan. The river is dammed in its upper third by Culmback Dam to form Spada Lake.
- Is My Blue Your Blue? (ismy.blue)
People have different names for the colors they see. Language can affect how we memorize and name colors. This is a color naming test designed to measure your personal blue-green boundary.