---
system: carbon
category: content
topic: voice-and-tone
content_type: guidance
status: latest
retrieved: 2026-05-16
source_url: https://carbondesignsystem.com/guidelines/content/overview/
tags: [voice, tone, content-design, ibm, brand]
---

# Carbon Design System — Voice and Tone

## Context

Carbon's content guidelines are built on and informed by the IBM Style Guide and IBM Design Language. They are designed for IBM product interfaces — a context that skews technical, enterprise, and international. The guidelines reflect IBM's need for clarity, consistency, and global accessibility above personality.

Carbon does not define a standalone brand voice separate from IBM. All voice guidance defers to IBM Brand Center's verbal expression guidelines.

---

## Voice

IBM's voice is defined by what IBM content looks like when it is at its best:

- It has a clear point of view.
- It's simple and logical.
- It builds on solid research, data, and analysis.
- It's intellectually ambitious, expressing a bigger idea.
- It's persuasive, not poetic.
- It's confident, but not boastful.
- It only ever uses figurative language for emphasis.
- It elevates facts and outcomes.
- It engages the thinker by speaking like the thinker.

This is a **functional, thought-leadership voice**: authoritative without being ornate, direct without being cold.

---

## Tone

Tone in Carbon adapts to the user's context within the product journey. The underlying voice stays consistent; word choices and sentence structure adjust.

Carbon frames tone adjustment along the product journey:

- **"Discover, try, buy" phases:** More conversational, friendly, and engaging. Longer sentences and fuller explanations are appropriate.
- **Error messages:** Economy of words is essential. Short phrases rather than sentences. No conversational warmth — clarity only.
- **Onboarding flows:** More time is warranted. Full sentences, friendly explanations, human pacing.

The principle: "Whatever the conversational level, the writing should always be simple, clear, and easy to understand. And keep the tone friendly, human, and inviting."

---

## Content quality standard

Carbon's overarching standard for all UI writing: "Well-designed content empowers people to use our offerings with ease. Words form the conversation a user has with a product, working with the visual elements and interactions to form a cohesive and tight experience."

Writing should:
- Be simple, clear, and easy to understand
- Use everyday language, not jargon
- Choose short words over long, impressive-sounding words
- Be succinct — keep sentences as short and simple as possible
- Never be terse — brevity should not come at the expense of clarity