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Designs substack.com

Substack design: colors, fonts and an AI prompt.

Substack's website sets its type in Spectral, on a light #FFFFFF canvas with #363737 text and a #FF6719 accent. Copy the palette and fonts, or a ready prompt to build something original in this style with Claude Code, Cursor, Lovable or v0.

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    Type and shape

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      Your agent builds new screens with these exact colors, type and corners, so nothing looks generic.

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      prompt.md

      What font does Substack use?

      Substack's website sets both headings and body text in Spectral, with ui-monospace for code. Body text is 14px, section headings 20px and the largest display type 104px, at weight 600. If you can't use Spectral, ask your AI for the closest free match and keep the sizes and weights.

      What are Substack's colors?

      Canvas#FFFFFFthe page background
      Surface#F0F0F0cards and raised areas
      Text#363737primary text
      Accent#FF6719buttons, links and focus
      Second accent#1BC47Dsecondary emphasis
      Muted#005591secondary text and captions
      Border#E6E6E6dividers and outlines

      How do I build a site that looks like Substack with AI?

      Open the Prompt tab above, change its first line to what you are building, and paste it into Lovable, v0, Bolt, Claude Code or Cursor. For a whole project, install the Claude skill or the Cursor rule instead, so every screen keeps the style. Build something original: keep Substack's look, not its name, logo or copy.

      Read from substack.com's public CSS on 8 October 2026. Siteprint is not affiliated with Substack; names and trademarks belong to their owners.