# Brand DNA: Enforce Brand Guidelines on AI Ad Creative | Xeli AI
> Encode fonts, palette, logo rules, tone and legal lines once. Every generated ad is validated against them before export, so scale never costs consistency.
- Canonical: https://xeli.ad/platform/brand-dna
- Type: platform
- Updated: 2026-07-01
- Entities: Brand Guidelines
- Topic coverage: 42% · AI citation readiness: 70%
The reason most teams distrust AI creative is not quality, it is drift. One run looks right, the next invents a gradient you have never used, sets your name in the wrong typeface, and crops the logo into the corner.
Brand DNA turns your guidelines into machine-checkable constraints. Colours are locked to your palette, type is locked to your licensed fonts, logo placement and clear space are enforced geometrically, and tone rules shape copy before a single asset is rendered.

## Where brand control usually breaks
- Guidelines live in a PDF nobody opens during a launch sprint.
- Freelancers and agencies each interpret the palette slightly differently, and the drift compounds quarter over quarter.
- Generative tools have no concept of a brand rule, so consistency depends entirely on the prompt someone typed.
- Nobody catches a contrast failure or a missing disclaimer until it is already spending.

## How it works
1. **Upload the kit** — Drop in logo files, font files, hex or OKLCH values, spacing rules and any legal copy that must appear in specific markets.
2. **Derive the tokens** — Xeli extracts a token set: primary, secondary, surface, text-on-brand, plus type scale and minimum logo size.
3. **Constrain generation** — Agents generate inside those tokens. The palette is not a suggestion in a prompt, it is the only colour set available to the renderer.
4. **Validate every export** — A QA pass checks contrast ratio, safe-zone overflow, logo clear space, banned words and required disclaimers, and rejects anything that fails.
5. **Report the exceptions** — Failures come back with the reason attached, so you fix a rule once rather than reviewing a thousand assets by eye.

## What you get
- **Contrast enforcement**: Text over imagery is checked against a 4.5:1 threshold, the same standard our free contrast checker uses, and re-laid out when it fails.
- **Typography lock**: Only your licensed families are used, with a defined scale so headlines stay dominant and legal copy stays legible.
- **Tone rules**: Banned words, claim restrictions, sentence length and voice examples steer the copywriter agent per market.
- **Multi-brand support**: House-of-brands teams keep separate kits with shared legal rules, so a single workspace can serve several labels.

## Where it stops
- Brand DNA enforces mechanical rules well: colour, type, spacing, contrast, required copy. Taste calls still belong to your art director.
- Fonts must be licensed for your use. Xeli does not supply commercial font licences.
- Rules written vaguely produce vague enforcement. 'Feel premium' is guidance for a human, not a constraint the QA agent can test.

### What if we do not have formal guidelines?
Point Xeli at your site and a handful of existing ads. It proposes a starter kit of palette, type and logo rules that you edit rather than author from scratch.

### Can different markets have different rules?
Yes. Kits support market overrides for legal copy, claim language and currency or measurement formats.

### Does this slow generation down?
Validation happens in the same pass as export and typically adds seconds, not minutes. Rejected assets regenerate automatically.

## Related
- [Creative Testing Framework](https://xeli.ad/guides/creative-testing-framework): A statistically-sound, budget-realistic framework for testing paid social creative — how many variants, how much spend, how long, and how to read the results.
- [Ad Color Contrast Checker](https://xeli.ad/free-tools/color-contrast-checker): Check text/background contrast against WCAG AA and AAA — critical for readable ad creative and landing pages.
- [Ad Safe Zone Overlay](https://xeli.ad/free-tools/ad-safe-zone-overlay): Overlay Meta Reels, Stories, and TikTok safe zones on your creative — see what gets covered by the UI before you launch.
- [Hex → OKLCH Brand Token Exporter](https://xeli.ad/free-tools/brand-token-exporter): Turn brand hex colors into OKLCH design tokens — export as CSS variables, Tailwind theme, or JSON.
- [Creative Testing](https://xeli.ad/glossary/creative-testing): The structured process of comparing ad variants to find winners.
- [AI ad generator alternatives](https://xeli.ad/compare/ai-ad-generator-alternatives): Outgrown prompt-in, image-out tools? Here are the five realistic alternatives for ecommerce creative, what each fixes, and what each costs you.
- [Creative automation software](https://xeli.ad/compare/creative-automation-software): The category splits into five approaches: templating, feed-driven banners, single-shot generators, agentic pipelines and services. What each is genuinely good at.
- [vs design tools](https://xeli.ad/compare/xeli-vs-design-tools): Design tools help one person make one ad well. Xeli generates, validates and ships creative for a whole catalog. Here is where each one actually fits.
## Entity graph
- [Brand Guidelines](https://xeli.ad/knowledge/brand-guidelines): Machine-readable rules that keep generated creative on-brand.
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Source: Xeli AI — the Agentic Creative OS for ecommerce. https://xeli.ad