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Slack
Founded 2009
About This Logo
The octothorpe reinterpreted as a pinwheel of four rounded bars in four colors — gold, green, red, and teal — set against a deep aubergine purple. The form is instantly readable as Slack's '#' origin story while functioning as a pure geometric shape.
AI Generation Prompt
Icon logo — a bold geometric pinwheel or radial shape formed from four rounded bars in contrasting colors (warm yellow, green, coral, teal), placed on a deep dark background, flat vector, no gradients, the form readable as both a letter and an abstract mark