Logo Design Guide

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

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

# 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:

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",
  "upscale_factor": 4
}'

Common Mistakes

File Format Delivery

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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