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

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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

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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

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❌ 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

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

Examples by Logo Type

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# 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

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# 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

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

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