Brand at a glance
Trace Slack from its colorful hashtag mark to the balanced pinwheel identity created for consistent use across products and platforms.
Eleven overlapping colors create a playful but technically demanding symbol for workplace conversation.
Official source: Slack official redesign announcement
Rounded shapes preserve energy while working reliably across app icons, products, and backgrounds.
Official source: Slack official redesign announcement
Slack’s early identity used eleven colors arranged as a tilted hashtag, an immediate reference to channels and online conversation. It felt playful and suited a fast-growing collaboration tool, but its many overlapping colors made exact reproduction difficult. Even a slightly wrong angle or background could change the mark.
In 2019 Slack and Pentagram rebuilt the idea from four rounded lozenges and four speech-bubble shapes. The palette contracted to four core colors and the new construction worked on white, black, and other controlled backgrounds without losing its energy.
The compact symbol can identify an app icon, loading screen, social avatar, or integration while the custom wordmark handles wider spaces. Its change shows how a young digital company can preserve personality while removing technical fragility.
Compare Slack’s app-first simplification with Microsoft and Dropbox, two other workplace platforms whose identities rely on modular geometry.
