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Brainfish. A near-monochrome page where a single vivid green stroke does all the work.

  • AI
  • Light theme
  • 11 colors
  • 3 typefaces

Brainfish operates as a minimalist editorial broadsheet: a near-monochrome canvas of paper white and deep ink, interrupted by a single highlighter-lime accent that makes every CTA feel like a mark on a page rather than a button on a screen. The type system pairs Geist's geometric clarity with Fraunces italic for one or two emphasis words inside a headline, creating a signature rhythm where a serif "actually" or "every" sits inside a sans-serif sentence. Components are printed rather than projected — 4px button corners, 2px hard offset shadows, 1px ink borders, and cream card surfaces that read as paper rather than glass. A topographic illustration runs beneath the entire page as a quiet watermark. Color is rationed: lime appears only where action is requested or where a section needs punctuation.

Screenshot of Brainfish
Captured from brainfishai.com on October 11, 2026

Brainfish design system

Brainfish

Brand1

  • Green action color for filled buttons, selected navigation states, and focused conversion moments.

Accent2

  • Green accent for outlined action borders, linked labels, and lightweight interactive emphasis

  • Gray action color for filled buttons, selected navigation states, and focused conversion moments

Neutrals8

  • Strongest display text and filled icon glyphs where maximum weight is needed inside a headline or pull-quote

  • Primary text color, default border, icon stroke, and hard shadow color. This is the single dark token that does structural work across text, lines, and elevation

  • Dark button and surface background — used for the large primary action blocks in the nav and hero where a heavier fill than ink is needed but true black would be too harsh

  • Secondary body text, supporting descriptions, and the slightly softer voice below a heading

  • Tertiary helper text, badge labels, copyright fine print, and the most de-emphasized text in the hierarchy

  • Hairline borders, card outlines, footer dividers, and the soft separator between sections

  • Warm off-white surface for cards, stat tiles, and footer — a barely-there yellow-green tint that distinguishes a lifted surface from the page without introducing a new color

  • Primary page canvas and inverse text on dark surfaces

Try a pairing

Pick any two colors from the palette to check whether text stays readable on top.

Aa

Black Ink on Lime Sprint

13.93 : 1 contrast

Background
Text
  • Body textPasses AA 4.5
  • Large textPasses AA 3
  • StrictPasses AAA 7

More DESIGN.md files. Same web, different personalities.