Gemini Prompt to Create a Brand Style Guide

Creating a brand style guide is a fundamental step for any brand wishing to establish its visual identity. Traditionally entrusted to experienced designers, this task can now be greatly facilitated with the help of artificial intelligence. Gemini, Google's multimodal model, excels at structuring complex documents and generating coherent visual recommendations. Using a well-crafted prompt, you can obtain a complete brand style guide including color palette, typography, logo usage rules, iconography, and layout guidelines. Gemini relies on its deep understanding of graphic design principles, color theory, and current trends to produce professional and reasoned recommendations. Whether you are an entrepreneur launching your brand, a designer looking for a solid starting point, or a marketing manager needing to formalize an existing identity, these prompts will save you considerable time while ensuring visual consistency across all your communication materials.

The prompt

Gemini

Act as a senior art director specializing in branding and visual identity. Create a complete and professional brand style guide for [BRAND NAME], a [INDUSTRY] company whose values are [VALUE 1, VALUE 2, VALUE 3] and which targets [TARGET AUDIENCE].

The guide must include the following sections:

Visual philosophy: Explain the chosen art direction and how it reflects the brand values.
Color palette:
- Primary color with HEX, RGB, and CMYK codes
- Secondary color with the same codes
- 2 to 3 accent colors
- Neutral colors (background, text)
- Justification for each color choice in relation to color psychology
Typography:
- Heading font (with free Google Fonts alternative)
- Body text font
- Optional accent font
- Typographic hierarchy (H1 to H4, body, caption) with recommended sizes
Logo:
- Usage rules (clear space, minimum size)
- Authorized versions (color, monochrome, reversed)
- Prohibited uses
Iconography and imagery:
- Recommended icon style
- Photography direction (mood, filters, composition)
- Examples of compatible stock image banks
Graphic elements:
- Recurring shapes and patterns
- Illustration style if applicable
- Recommended layout grid
Applications:
- Business card
- Email signature
- Social media post
- Sample web page

Format everything in a structured manner with tables for color codes and typographic sizes. Be precise and actionable in each recommendation.

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Why it works

This prompt uses role-play (senior art director) to activate Gemini's specialized knowledge in design and branding. The ultra-detailed structure with seven numbered sections eliminates ambiguity and forces an exhaustive and organized output. The variables in brackets allow contextual customization while maintaining a rigorous professional framework, and the request for justification (color psychology, link with values) ensures reasoned rather than arbitrary choices.

Expected result

You will get a complete brand style guide document of 1500 to 2500 words, structured in seven sections with precise color codes (HEX, RGB, CMYK), a numerical typographic hierarchy, and clear usage rules for each visual element. The result will include formatted tables for quick reading as well as practical recommendations directly applicable to your print and digital materials.

Variants by level

FAQ

Can Gemini generate the visuals of the brand style guide in addition to the text?

Gemini has image generation capabilities via Imagen. You can ask it to create moodboards, visual palette examples, or application mockups after generating the textual guide. However, for a professional logo or precise vector elements, it is recommended to use the guide as a brief for a designer or specialized tool like Adobe Illustrator. Gemini's strength lies in strategic structuring and reasoned recommendations rather than producing print-ready files.

How to adapt the prompt if I already have a logo and some existing visual elements?

Add a section at the beginning of the prompt describing your existing elements: current logo colors with their HEX codes, fonts already in use, and any visual elements you wish to keep. Then instruct Gemini to build the guide around these constraints by adding, for example: "The guide must be built around my existing logo which uses [HEX 1] and [HEX 2] colors. Keep these colors as a base and develop a complete system around them." You can also attach an image of your logo if you are using Gemini in multimodal mode.

What is the difference between a brand style guide generated by Gemini and one from a professional designer?

A guide generated by Gemini provides a complete structure, reasoned color and typography recommendations, and detailed usage rules. It is an excellent starting point or a functional document for small organizations. However, a professional designer brings original logo creation, source vector files, pixel-perfect mockups, unique artistic sensitivity, and iterations based on user testing. The optimal approach is to use Gemini for strategic framing and documentation, then bring in a designer to create original graphic elements and finalize production files.

How to use this prompt

Copy the prompt with the button above.
Paste it into ChatGPT, Claude or your favorite AI assistant.
Replace the bracketed variables with your details, then refine the result.

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