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Design & creation

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Updated 10-16 01:17

About this skill

Logo generation

Spec

  • Master: 1024×1024 RGBA PNG, transparent background, subject centered in 80% safe zone
  • Vector: SVG, ≤200 paths, fixed viewBox, SVGO optimized
  • Monochrome: 1-color mono variant (auto-derived via luminance threshold or separate generation)
  • Wordmark routing — model-specific, not blanket:
    • Paragraph-length OK: gpt-image-2, gemini-3-pro-image-preview (Nano Banana Pro), gpt-image-1.5. Include the wordmark in the prompt; composite stays safer for pixel-exact UI copy.
    • 3–10 words reliable: ideogram-3 / ideogram-3-turbo, gemini-3.1-flash-image-preview (Nano Banana 2), gpt-image-1, flux-2 family.
    • ≤3 words / ≤25 chars: Imagen 4 family, Recraft V4.
    • Composite always: Flux 1.x, Flux Schnell, SDXL, SD 1.5, Mystic, Pollinations, original Nano Banana 1.

Routing by intent

text in mark? vector needed? primary fallback
none yes Recraft V4 (native SVG) gpt-image-1.5 → BiRefNet → vtracer
none no gpt-image-1.5 (background:"transparent") Ideogram 3 Turbo (dedicated /v1/ideogram-v3/generate-transparent endpoint, rendering_speed:"TURBO")
1–3 words yes Ideogram 3 → raster 1024 → BiRefNet → K-means(6) → vtracer → SVGO Recraft V4
1–3 words no Ideogram 3 gpt-image-1.5
4–10 words yes flux-2 / gpt-image-2 → raster 1024 → BiRefNet → K-means(6) → vtracer → SVGO Nano Banana Pro
4–10 words no flux-2 family or gpt-image-2 (note: gpt-image-2 has no native RGBA — matte after) Nano Banana Pro
paragraph any Nano Banana Pro or gpt-image-2; composite is still safer for pixel-exact UI copy composite via BrandBundle.typography

Dialect-ready prompt scaffold

A [flat vector | isometric | brutalist | soft gradient] logo mark representing [SUBJECT, concrete noun phrase].
Centered composition. Clean silhouette, strong tight outline, high contrast.
Palette: [#hex, #hex, #hex] strictly.
["WORDMARK TEXT" in sans-serif, tight tracking | text-free mark].
Solid pure white background. Square 1:1 aspect. 1024x1024.

For SD: prepend masterpiece, vector logo, flat design, minimalist, 8k, . For Flux: drop all quality modifiers; be concrete about subject and palette.

Post-process

  1. BiRefNet matte (or Recraft SVG → rasterize at 1024).
  2. Checkerboard-pattern probe: reject if failed.
  3. If SVG needed: K-means 6-color → vtracer --mode polygon → SVGO (conservative preset).
  4. Monochrome variant: greyscale → Otsu threshold → tint brand black.
  5. Validate: tight-bbox ≤ 80% safe zone, palette ΔE2000 ≤ 10, OCR matches wordmark if present.

Failure → action

  • Checkerboard → route to gpt-image-1 (different provider).
  • Wordmark garbled → regenerate mark text-free, composite SVG type.
  • Palette drift → Recraft controls.colors or recolor post.

  • 200 SVG paths → regenerate with "simpler geometry" or raise K-means color count.

Output

logo/
├── master.png        # 1024² RGBA
├── mark.svg          # vector
├── mark-mono.svg     # monochrome
├── mark-inverse.png  # dark-mode variant
└── meta.json         # provenance + validations