logo-design-guide

SKILL.md

Install the belt CLI skill: npx skills add belt-sh/cli

Logo Design Guide

Design effective logos with AI image generation via inference.sh CLI.

Quick Start

Requires inference.sh CLI (belt). Install instructions

belt login

Generate a logo concept

belt app run falai/flux-dev-lora --input '{
"prompt": "flat vector logo of a mountain peak with a sunrise, minimal geometric style, single color, clean lines, white background",
"width": 1024,
"height": 1024
}'

## Logo Types

| Type | Description | When to Use | Example |
|------|-------------|-------------|---------|
| **Wordmark** | Company name styled as logo | Strong brand name, short (< 10 chars) | Google, Coca-Cola |
| **Lettermark** | Initials only | Long company name, formal | IBM, HBO, CNN |
| **Pictorial** | Recognizable icon/symbol | Universal brand, works without text | Apple, Twitter bird |
| **Abstract** | Geometric/non-literal shape | Tech companies, conceptual brands | Nike swoosh, Pepsi |
| **Mascot** | Character illustration | Friendly brands, food/sports | KFC Colonel, Pringles |
| **Combination** | Icon + wordmark together | New brands needing both recognition and name | Burger King, Adidas |

## Critical AI Limitation

**AI image generators cannot reliably render text.** Letters will be distorted, misspelled, or garbled.

Strategy:
1. Generate the **icon/symbol only** with AI
2. Add text/wordmark in a design tool (Figma, Canva, Illustrator)
3. Or use a combination approach: AI icon + manually set typography

## Prompting for Logos

### Keywords That Work

flat vector logo, simple minimal icon, single color silhouette,
geometric logo mark, clean lines, negative space design,
line art logo, flat design icon, minimalist symbol

### Keywords That Fail

❌ photorealistic logo (contradiction — logos aren't photos)
❌ 3D rendered logo (too complex, won't scale down)
❌ gradient logo (inconsistent results, hard to reproduce)
❌ logo with text "Company Name" (text rendering fails)

### Prompt Structure

flat vector logo of [subject], [style], [color constraint], [background], [additional detail]

### Examples by Logo Type

```bash
# Abstract geometric
belt app run falai/flux-dev-lora --input '{
  "prompt": "flat vector abstract logo, interlocking hexagonal shapes forming a letter S, minimal geometric style, single navy blue color, white background, clean sharp edges"
}'

# Pictorial nature
belt app run falai/flux-dev-lora --input '{
  "prompt": "flat vector logo of a fox head in profile, geometric faceted style, orange and white, minimal clean lines, white background, negative space design"
}'

# Mascot style
belt app run bytedance/seedream-4-5 --input '{
  "prompt": "friendly cartoon owl mascot logo, simple flat illustration, wearing graduation cap, purple and gold colors, white background, clean vector style"
}'

# Tech abstract
belt app run xai/grok-imagine-image-pro --input '{
  "prompt": "minimal abstract logo mark, interconnected nodes forming a brain shape, line art style, single teal color, white background, tech startup aesthetic"
}'

Scalability Rules

A logo must work at every size:

Context
Size
What Must Work

Favicon
16x16 px
Silhouette recognizable

App icon
1024x1024 px
Full detail visible

Social avatar
400x400 px
Clear at a glance

Business card
~1 inch
Clean print reproduction

Billboard
10+ feet
No pixelation, simple enough

Scalability Checklist

 Recognizable as a 16px favicon (squint test)

 Works in single color (black on white)

 Works inverted (white on black)

 No tiny details that disappear at small sizes

 No thin lines that vanish when shrunk

 Clear silhouette without color

Color Guidelines

Maximum 2-3 colors for the primary logo

Must work in single color (black, white, or brand primary)

Consider color psychology:

Blue: trust, professional (finance, tech, healthcare)

Red: energy, urgency (food, entertainment, retail)

Green: growth, nature (health, sustainability, finance)

Orange: friendly, creative (startups, youth brands)

Purple: luxury, wisdom (beauty, education)

Black: premium, elegant (fashion, luxury, tech)

Test on both light and dark backgrounds

Iteration Workflow

# Step 1: Generate 5-10 broad concepts
for i in {1..5}; do
  belt app run falai/flux-dev-lora --input '{
    "prompt": "flat vector logo of a lighthouse, minimal geometric, single color, white background"
  }' --no-wait
done

# Step 2: Refine the best concept with variations
belt app run falai/flux-dev-lora --input '{
  "prompt": "flat vector logo of a geometric lighthouse with light beam rays, minimal line art, navy blue, white background, negative space design"
}'

# Step 3: Generate at high resolution for final
belt app run bytedance/seedream-4-5 --input '{
  "prompt": "flat vector logo of a geometric lighthouse with radiating light beams, minimal clean design, navy blue single color, pure white background",
  "size": "2K"
}'

# Step 4: Upscale for production use
belt app run falai/topaz-image-upscaler --input '{
  "image": "path/to/best-logo.png",
  "scale": 4
}'

Common Mistakes

Mistake
Problem
Fix

Too much detail
Loses clarity at small sizes
Simplify to essential shapes

Relies on color
Fails in B&W contexts
Design in black first

Text in AI generation
Garbled/misspelled letters
Generate icon only, add text manually

Trendy effects (glows, shadows)
Dates quickly, reproduction issues
Stick to flat, timeless design

Too many colors
Hard to reproduce, expensive printing
Max 2-3 colors

Asymmetric without purpose
Looks unfinished
Use intentional asymmetry or stay balanced

File Format Delivery

Format
Use Case

SVG
Scalable vector, web, editing

PNG (transparent)
Digital use, presentations

PNG (white bg)
Documents, email signatures

ICO / Favicon
Website favicon (16, 32, 48px)

High-res PNG (4096px+)
Print, billboards

Note: AI generates raster images (PNG). For true vector SVG, use the AI output as a reference and trace in a vector tool, or use AI-to-SVG conversion tools.

Related Skills

npx skills add inference-sh/skills@ai-image-generation
npx skills add inference-sh/skills@prompt-engineering

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