---
version: alpha
name: Heptabase
description: Light design system extracted from heptabase.com (DOM-true values, Emblematic extractor 0.2.0, 2026-11-12).
colors:
  background: "#FFFFFF"
  on-surface: "#2E2E2E"
  surface: "#EEEDED"
  on-surface-variant: "#000000B8"
  outline: "#00000014"
  new-bg-section: "#FCFCFC80"
  background-primary: "#F7F7F7"
  bg-blue-sect: "#D2E7EF66"
  border-blue-sect: "#53B1F3"
  bg-green-sect: "#D8E4D366"
  new-text-tertiary: "#6A6972"
  bg-yellow-sect: "#F7ECCA66"
  bg-orange-sect: "#F4E1CD66"
  option-green: "#31D86980"
  color-15: "#4B9BE61F"
  bg-red-sect: "#F5D6D866"
  primary: "#207DFF"
typography:
  display-lg:
    fontFamily: Instrument Sans
    fontSize: 48px
    fontWeight: 500
    lineHeight: 1.3
    letterSpacing: -0.033em
  headline-md:
    fontFamily: Instrument Sans
    fontSize: 44px
    fontWeight: 500
    lineHeight: 1.4
    letterSpacing: -0.033em
  title-md:
    fontFamily: Inter
    fontSize: 16px
    fontWeight: 600
    lineHeight: 1.5
  body-md:
    fontFamily: Inter
    fontSize: 17px
    fontWeight: 400
    lineHeight: 1.5
  body-sm:
    fontFamily: Inter
    fontSize: 14px
    fontWeight: 400
    lineHeight: 1.429
  mono-md:
    fontFamily: Menlo
    fontSize: 11px
    fontWeight: 400
    lineHeight: 1.455
rounded:
  xs: 4px
  sm: 6px
  md: 8px
  lg: 12px
  full: 9999px
spacing:
  xxs: 2px
  xs: 3px
  sm: 4px
  md: 6px
  lg: 7px
  xl: 8px
  2xl: 10px
  3xl: 12px
  4xl: 16px
  5xl: 20px
  6xl: 24px
  7xl: 32px
  8xl: 48px
  container: 1300px
components:
  button-primary:
    backgroundColor: "{colors.on-surface}"
    textColor: "{colors.background}"
    rounded: "{rounded.full}"
    padding: 8px
    height: 36px
  button-secondary:
    textColor: "{colors.on-surface-variant}"
    rounded: "{rounded.full}"
    padding: 3px
    height: 28px
  card:
    backgroundColor: "{colors.background}"
    rounded: "{rounded.lg}"
    padding: 24px
---

# Heptabase

> Extracted from [https://heptabase.com/](https://heptabase.com/) on 2026-11-12 by Emblematic. Every value below was read from the rendered DOM (computed styles, `document.fonts`, and the fonts Chrome actually used to paint text), not estimated from pixels. When the YAML front matter and this prose disagree, the YAML wins. Copy values from this file exactly; don't transcribe them from memory. Don't copy logos, imagery, illustrations or marketing copy.

## Overview

Heptabase uses a light canvas (#FFFFFF) with a palette. Type is set in **Inter**, **Instrument Sans** (display), **Menlo** (mono), with 17px body text. Layout: 1300px container, top-sticky navigation, 11 sections. Built with next.js, tailwind, posthog, vercel.

## Colors

Area-weighted from painted backgrounds, text and borders on the 1440px light capture. Roles are inferred from usage (largest background, most text, interactive fills). Every hex is an exact computed value; a role marked *unverified* is a best guess that has not passed review, so its canonical token (e.g. `primary`) is left out of the front matter.

| Token | Hex | OKLCH | Role | Share of paint | CSS variable |
|---|---|---|---|---|---|
| `background` | `#FFFFFF` | 1 0 0 | bg | 57.4% | `--menu-bg` |
| `on-surface` | `#2E2E2E` | 0.301 0 0 | text | 12.7% | `--text-color` |
| `surface` | `#EEEDED` | 0.947 0.001 17.2 | surface | 13.7% | `--whiteboard-background` |
| `on-surface-variant` | `#000000B8` (on bg `#474747`) | 0 0 0 | muted | 1.4% | `--new-text-secondary` |
| `outline` | `#00000014` (on bg `#EBEBEB`) | 0 0 0 | border | 1.2% | `--new-border-light` |
| `new-bg-section` | `#FCFCFC80` (on bg `#FEFEFE`) | 0.991 0 0 | other | 2.1% | `--new-bg-section` |
| `background-primary` | `#F7F7F7` | 0.976 0 0 | other | 1.6% | `--background-primary` |
| `bg-blue-sect` | `#D2E7EF66` (on bg `#EDF5F9`) | 0.915 0.025 222.6 | other | 0.94% | `--bg-blue-sect` |
| `border-blue-sect` | `#53B1F3` | 0.731 0.131 242.2 | other | 0.93% | `--border-blue-sect` |
| `bg-green-sect` | `#D8E4D366` (on bg `#EFF4ED`) | 0.905 0.026 136.3 | other | 0.74% | `--bg-green-sect` |
| `new-text-tertiary` | `#6A6972` | 0.525 0.014 291 | other | 0.52% | `--new-text-tertiary` |
| `bg-yellow-sect` | `#F7ECCA66` (on bg `#FCF7EA`) | 0.943 0.046 92.2 | other | 0.43% | `--bg-yellow-sect` |
| `bg-orange-sect` | `#F4E1CD66` (on bg `#FBF3EB`) | 0.92 0.034 68.8 | other | 0.43% | `--bg-orange-sect` |
| `option-green` | `#31D86980` (on bg `#98ECB4`) | 0.776 0.202 149.3 | other | 0.39% | `--option-green` |
| `color-15` | `#4B9BE61F` (on bg `#E9F3FC`) | 0.673 0.136 249.3 | other | 0.38% | — |
| `bg-red-sect` | `#F5D6D866` (on bg `#FBEFEF`) | 0.902 0.035 13.4 | other | 0.37% | `--bg-red-sect` |

Sparse chromatic highlights (not accents): `#53B1F3` (`--border-blue-sect`), `#DE242B`, `#E89A3B80` (`--option-orange`), `#E89A3B` (`--border-orange-sect`).

Contrast: text on background 13.58:1, muted text 9.23:1, accent 3.86:1.

Gradients in use: `radial-gradient(110% 90% at 10% 10%, rgba(255, 255, 255, 0.35), rgba(0, 0, 0, 0) 52%), linear-gradient(rgb(233, 230, 223) 0%, rgb(213, 210, `; `linear-gradient(rgb(250, 249, 245), rgba(0, 0, 0, 0))`.

The site does not change under `prefers-color-scheme: dark`.

## Typography

| Family | Role | Weights | Share of text | Source |
|---|---|---|---|---|
| **Inter** (CSS: `__Inter_582115`) | body | 400, 450, 500, 600, 700 | 73.9% | webfont |
| **Instrument Sans** (CSS: `__instrumentSans_c1b0f9`) | display | 500 | 18.7% | webfont |
| **蘋方-簡** (CSS: `__Inter_582115`) | other | 400 | 4.0% | system (stack `__Inter_582115, __Inter_Fallback_582115, sans-serif`, resolved on macos) |
| **Hiragino Sans** (CSS: `__Inter_582115`) | other | 400 | 2.3% | system (stack `__Inter_582115, __Inter_Fallback_582115, sans-serif`, resolved on macos) |
| **Menlo** (CSS: `ui-monospace`) | mono | 400 | 0.10% | system (stack `ui-monospace, "SF Mono", "Cascadia Code", Menlo, monospace`, resolved on macos) |

Scale (px): 12, 14, 16, 17, 18, 32, 36, 44, 48. Effective ratio ≈ 1.231 (close to a major third). Body 17px at line-height 1.5; display 48px with tracking -0.033em. Headings are sentence case. On a 390px viewport the body is 17px and display 38px.

## Layout

Spacing has no reliable single base unit; the most used steps are 2, 3, 4, 6, 7, 8, 10, 12, 16, 20, 24, 32, 48px. Sections open with about 100px of space before their first line of text. Content sits in a 1300px container on a 5-column grid. Text density 0.126 (text area / page area).

Section order (desktop). Kinds below the review threshold are shown as *section*:

1. **nav** (72px, bg #FDFCFB)
2. **hero** — “Heptabase” (64px, bg #FDFCFB)
3. **section** — “AI gives you answers. Heptabase builds your worldview.” (1600px, bg #FDFCFB)
4. **logos** — “Deeply understand your sources with .” (243px, bg #FDFCFB)
5. **section** — “XII. Of the academical or sceptical Philosophy, Part III — Proper Objects of Sci” (808px, bg #FDFCFB)
6. **section** — “Forge your worldview with nested .” (1091px, bg #FDFCFB)
7. **section** — “. divided and re-united without loss , and can be keep Metals won because they” (1592px, bg #FDFCFB)
8. **section** — “Designed with the best methods for learning.” (930px, bg #FDFCFB)
9. **section** — “Loved by users worldwide.” (1247px, bg #FCFCFC)
10. **section** — “Explore what people are making” (827px, bg #FDFCFB)
11. **footer** — “Heptabase” (603px, bg #FFFFFF)

## Elevation & Depth

Style: subtle. Most used shadows:

- `rgba(0, 0, 0, 0.08) -1px 0px 0px 0px inset`
- `rgba(0, 0, 0, 0.08) 0px -1px 0px 0px inset`
- `rgba(15, 15, 15, 0.1) 0px 2px 4px 0px`

## Shapes

Dominant corner radius 6px; radii in use: 4px, 6px, 8px, 12px, pill. Borders: heavy (3px).

## Components

- **button-primary**: backgroundColor `#2E2E2E`, textColor `#FFFFFF`, rounded `9999px`, padding `8px 16px`, height `36px`, fontFamily `Inter`, fontSize `16px`, fontWeight `500` (e.g. “Get started”)
- **button-secondary**: textColor `#000000B8`, rounded `9999px`, padding `3px 12px`, height `28px`, fontFamily `Inter`, fontSize `14px`, fontWeight `500`, border `1px solid #00000014` (e.g. “Readwise”)
- **card**: rounded `12px`, padding `24px`, backgroundColor `#FFFFFF`, border `1px solid #00000014`

## Do's and Don'ts

- Do set body copy in Inter at 17px / 1.5.
- Do use Instrument Sans only for display sizes, not for body text.
- Do tighten large headlines (-0.033em at 48px).
- Don't introduce font weights beyond 400, 450, 500, 600, 700.
- Do keep corners at 6px for most controls, and use the larger radii only for cards and media.
- Don't copy this site's logos, illustrations, photography or copy; use the system, not the brand assets.

## Provenance

Spec v2, extractor 0.2.0. Render quality: **ok**. Vision pass: not run. Fields below confidence 0.7 are hedged or left out above: `color.accent_strategy`, `layout.columns`, `layout.hero`, `layout.section_count`, `sections[].kind`, `space.base`, `space.section_padding_px`. Full per-field provenance is in `spec.json`.