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Slack

Reduce the parts. Keep the personality.

Library
Logo studyUse as reference
Edition
2019 / Octothorpe
Design credit
Pentagram · Michael Bierut · Slack team
Sector
Technology
Form
Modular geometric symbol
Slack identity presentation — Pentagram case study.
Slack identity presentation — Pentagram case study.

The identity system

The same rounded elements extend into illustrations and motifs. Aubergine provides a recognizable setting for the multicolor symbol and the wordmark.

Editorial study of the published system

Documented process

Pentagram explored several directions before retaining the familiar octothorpe. The new grid combines speech bubbles and lozenges. Four primary colors replaced the earlier eleven, addressing reproduction and consistency problems.

Read the source

Sources & credits

Pentagram / Slack case studySlack / brand guidelinesVector source

Curated September 2026. Design and source imagery belong to their credited owners. This is an independent educational study, not an asset license or an affiliation.