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(Brand guidelines) // Productivity software

Slack brand
guidelines

Slack’s logo, colors, fonts, voice, and dos and don’ts, from the Brand Skill Rainbrand built from slack.com.

Download the Brand Skill
Slack from Salesforce logo in white
  • Aubergine#481A54
  • Slack Purple#730394
  • Blue#00B3FF
  • Green#41B658

About Slack

Slack is an AI-powered work platform that brings people, conversations, apps, and agents together. Its brand combines clear, practical guidance with an energetic, approachable voice and a focus on making work simpler, more connected, and more productive.

Use the Slack logo, the four-color octothorpe beside the slack logotype, for primary identification. On slack.com it carries the “from Salesforce” endorsement. Use the standalone octothorpe where space is limited.

Keep clear space around the logo at least the length of one pill shape in the octothorpe. Keep the octothorpe’s colors, size and position against the logotype as drawn.

Slack colors

  • Aubergine

    Signature dark background

    HEX
    RGB

  • Slack Purple

    Primary buttons and accents

    HEX
    RGB

  • Blue

    Octothorpe color and accent

    HEX
    RGB

  • Green

    Octothorpe color

    HEX
    RGB

  • Yellow

    Octothorpe color

    HEX
    RGB

  • Pink

    Octothorpe color

    HEX
    RGB

  • Near-black

    Text

    HEX
    RGB

  • White

    Backgrounds and text on Aubergine

    HEX
    RGB

Slack fonts

  • Salesforce Avant Garde

    Main heading · 700, Secondary heading · 600

  • Salesforce Sans

    Supporting heading · 600, Body · 400, Button · 700

Font names only. The Brand Skill download doesn’t include font files.

Slack’s voice

Slack’s voice is direct, friendly, and optimistic. Lead with a useful outcome, speak to people in plain language, and make complex capabilities feel approachable. Use active, conversational phrasing and a light touch of playfulness; keep enterprise and security messaging confident without sounding alarmist.

  • “All your people and AI agents working together”
  • “AI in Slack delivers action, not just answers”
  • “Let your people connect like people”
  • “Bring conversations out of the inbox”
  • “Work without worry”

Dos and don’ts

Do

  • Leave clear space around the logo at least the length of one pill shape in the octothorpe; use the octothorpe alone where space is tight.
  • Use Aubergine and Slack Purple as the signature colors, and keep strong contrast between text and its background.
  • Make copy conversational, benefit-led, and easy to understand. Use active language and a human, encouraging tone.
  • Keep product imagery grounded in Slack’s real experience: channels, conversations, canvases, search, automation, and collaboration.

Don’t

  • Don’t shuffle or change the colors of the octothorpe, or change its size or position against the logotype.
  • Don’t re-create the logotype in another typeface, outline it, or add shadows and other effects.
  • Don’t use old versions of the Slack logo.
  • Don’t make the voice stiff, vague, or needlessly technical when a clear, human phrase will do.

More from the Brand Skill

Brand artwork and editorial imagery

Slack’s marketing imagery supports clear, lively storytelling about working together. It includes friendly dimensional illustrations, colorful geometric forms, product-led scenes, editorial cards, and photography of people working. Use this imagery to make the brand feel human, practical, and optimistic; preserve the role of each image in its surrounding design.

Product and experience imagery

Use authentic Slack product imagery to show work happening in context: conversations in channels, collaboration with agents, canvases, huddles, search, templates, and workflow automation. Product screenshots are part of the visual language; preserve the interface itself when depicting Slack. Use promotional scenes and illustrations to make the benefit clear without obscuring the product experience.

Download Slack’s Brand Skill

A Brand Skill is a folder of brand guidance written for agents. Give it to Claude, ChatGPT, Cursor or another agent and ask it to follow Slack’s guidelines. It starts at SKILL.md, which points to the right file for each task.

This copy includes the guidance and logos. It leaves out the reference images and font files.

Download the Brand Skill

slack-brand-skill/

├ SKILL.md

├ README.md

├ references/

│ ├ colors.md

│ ├ logo.md

│ ├ typography.md

│ ├ brand-imagery.md

│ ├ dos-and-donts.md

│ ├ product-experience-imagery.md

│ └ voice.md

└ assets/logos/

├ slack-logo.png

├ slack-logo-2.png

└ slack-logo-3.svg

Rainbrand’s Brand Agent built this Brand Skill from slack.com on 30 Oct 2026. It isn’t Slack’s official guide. Reviewed by Siddharth Borderwala, Founding Engineer at Rainbrand.

Slack and its logos are trademarks of Slack Technologies, LLC. Rainbrand isn’t affiliated with or endorsed by Slack Technologies, LLC.

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