Favicon · Brand Refresh — 2026-05-18

Design

Minimalist Sigma mark for Insiders Trades Sigma.

• Glyph: uppercase Greek Sigma Σ
• Foreground: warm gold #c9a44a
• Background: deep navy #112A46, rounded-square
• No text, no shadow, no gradient, sharp vector-like edges
• Optimized for tiny display sizes (16px target)

Generation pipeline

1. Master: generated via OpenAI gpt-image-1, size=1024x1024, quality=medium. Approx cost: ~$0.04 USD. Script: _gen-favicon.mjs (excluded from git via leading underscore convention).
2. Downscale: sharp (lanczos3 kernel) → PNG at 16, 32, 48, 64, 128, 192, 256, 512.
3. ICO: magick multi-resolution (16 + 32 + 48) → public/favicon.ico.
4. Brand-named replacements:
   • public/icon-192.png (PWA)
   • public/icon-512.png (PWA)
   • public/apple-touch-icon.png (180x180)

Files placed

public/favicon.ico                  (16+32+48 multi-res)
public/favicon-16x16.png
public/favicon-32x32.png
public/favicon-48x48.png
public/favicon-64x64.png
public/favicon-128x128.png
public/favicon-192x192.png
public/favicon-256x256.png
public/favicon-512x512.png
public/icon-192.png                 (replaced)
public/icon-512.png                 (replaced)
public/apple-touch-icon.png         (replaced)
public/site.webmanifest             (updated: brand colors, EN, Sigma branding)

Layout metadata

src/app/layout.tsx updated:

• Added favicon-16x16.png + favicon-32x32.png to icons.icon
• Added Safari pinned-tab mask-icon with gold color #c9a44a
• Existing apple-touch-icon + manifest links preserved

Google declaration

Google discovers favicons automatically from <link rel="icon"> once deployed. No manual Search Console step required. Recommended verification post-deploy:

curl -sI https://insiders-trades.com/favicon.ico | grep -iE "status|content-type"
curl -sI https://insiders-trades.com/icon-512.png | grep -iE "status|content-type"

Google Search favicon refresh cadence: 1-3 weeks after next crawl.

Manifest changes

site.webmanifest:

• Name + short_name rebranded to "Insiders Trades Sigma" / "InsiderTrades Σ"
• background_color switched cream #FDFBF7 → navy #112A46 (matches dark brand surface on splash)
• lang switched fr → en (primary locale)
• Added purpose: "maskable" 512 variant for Android adaptive icons

Verification (post-deploy)

for f in favicon.ico favicon-32x32.png icon-192.png icon-512.png apple-touch-icon.png site.webmanifest; do
  printf "%-25s " "$f"
  curl -sI "https://insiders-trades.com/$f" | head -1
done

Sample preview: /tmp/favicon-preview.png (256x256 downscale of master).