# Highcharts design system

> Highcharts design system measured from highcharts.com: IBM Plex Sans font, #626BD0 primary, 13 color hex codes, type scale, spacing and a free DESIGN.md.

Canonical page: https://sitepeel.dev/design-md/highcharts.com/

Highcharts’s website (highcharts.com) uses the IBM Plex Sans font and #626BD0 as its main color on a white background. Measured by Sitepeel on November 4, 2026.

## What font does Highcharts use?

Highcharts uses IBM Plex Sans (weights 400, 500 and 700) and IBM Plex Sans Variable (weight 600) on highcharts.com. Page titles are 56px at weight 700 (42px on phones) and body text is 14px. Measured on November 4, 2026.

- IBM Plex Sans (weights 400, 500, 700)
- IBM Plex Sans Variable (weights 600)

## Highcharts colors: palette and hex codes

Highcharts’s main colors are #FFFFFF (white) for the background, #18171C (charcoal) for text and #626BD0 (indigo) as the main accent, with #047857 (dark teal) and #8087E8 (light indigo) as other accents. Measured on November 4, 2026.

- #FFFFFF: white
- #18171C: charcoal
- #000000: near black
- #F0F1FF: cool snow
- #F2F1F4: mist
- #E3E3E8: mist
- #626BD0: indigo
- #2F2E38: cool graphite

## What is Highcharts built with?

Highcharts’s website (highcharts.com) is built with WordPress, Gutenberg, React and Cloudflare. Measured on November 4, 2026.

- Site builder & CMS: WordPress 7.0.8, Gutenberg
- JavaScript framework: React 19.2.1
- Hosting & CDN: Cloudflare
- Marketing & support: Cookiebot
- Analytics: Google Ads, Google Analytics, Google Tag Manager

## Questions and answers

### What font does Highcharts use?

Highcharts’s website uses IBM Plex Sans (weights 400, 500 and 700) and IBM Plex Sans Variable (weight 600). Page titles are 56px at weight 700 (42px on phones) and body text is 14px. Measured on November 4, 2026.

### What are the Highcharts colors and hex codes?

On highcharts.com: #FFFFFF (white) for the background, #18171C (charcoal) for text and #626BD0 (indigo) as the main accent, with #047857 (dark teal) and #8087E8 (light indigo) as other accents. The color palette above lists all 13 colors with their hex codes and where each one is used.

### What is the Highcharts design system?

The design system on this page is highcharts.com’s, as measured on November 4, 2026: IBM Plex Sans type, #626BD0 as the main color and 8px corners, written down as a DESIGN.md. It is not Highcharts’s own documentation.

### What is Highcharts built with?

Highcharts’s website (highcharts.com) is built with WordPress, Gutenberg, React and Cloudflare. The full tech stack Sitepeel found: WordPress, React, Cloudflare, Cookiebot, Gutenberg, Google Ads, Google Analytics and Google Tag Manager. Measured on November 4, 2026.

### What is the Highcharts DESIGN.md?

A plain-text file with Highcharts’s measured colors, type, spacing, corners and components as tokens, plus short rules, in the DESIGN.md format Google published with Stitch. Your AI coding agent reads it and builds in this style. More about DESIGN.md.

### How do I use it with Claude Code or Cursor?

Download the file and put it in your project’s root folder, then ask your agent to follow DESIGN.md. Step-by-step guides: Claude Code, Cursor, Codex, GitHub Copilot.

### Is this Highcharts’s official design system?

No. Sitepeel measured it from highcharts.com’s public page on November 4, 2026. It is an independent analysis, not made or approved by Highcharts.

### Can I use Highcharts’s style in my own product?

Use it to learn, prototype and compare. For a real product, make the style your own, and never copy Highcharts’s logo, name, pictures or text.

### How accurate are the values?

Each value was measured on the rendered page after it fully loaded, on desktop and mobile: colors where they appear, type with tracking, spacing, corners, shadows and hover states. Sites change, so check the date at the top.

## Files

- [DESIGN.md](https://sitepeel.dev/design-md/highcharts.com/DESIGN.md): the plain file to put in your project.
- [All brand DESIGN.md files](https://sitepeel.dev/design-md/examples/index.md)

Independent analysis by Sitepeel (sitepeel.dev), not affiliated with Highcharts.

## The DESIGN.md file

```markdown
---
version: alpha
name: Highcharts
description: "Light interface measured from highcharts.com: IBM Plex Sans type with IBM Plex Sans Variable, indigo accents, tonal surfaces and 8px corners."
colors:
  background: "#FFFFFF"
  surface: "#FFFFFF"
  on-surface: "#18171C"
  on-background: "#18171C"
  on-surface-strong: "#000000"
  surface-container-low: "#F0F1FF"
  surface-container: "#F2F1F4"
  outline: "#0000001F"
  outline-variant: "#E3E3E8"
  primary: "#626BD0"
  on-primary: "#FFFFFF"
  inverse-surface: "#2F2E38"
  secondary: "#047857"
  tertiary: "#8087E8"
  success: "#065F46"
typography:
  headline-display:
    fontFamily: IBM Plex Sans
    fontSize: 56px
    fontWeight: 700
    lineHeight: 1.3
  headline-lg:
    fontFamily: IBM Plex Sans
    fontSize: 42.5px
    fontWeight: 700
    lineHeight: 1.3
  headline-md:
    fontFamily: IBM Plex Sans
    fontSize: 25px
    fontWeight: 700
    lineHeight: 1.3
  headline-sm:
    fontFamily: IBM Plex Sans Variable
    fontSize: 22px
    fontWeight: 600
    lineHeight: 1.3
  body-md:
    fontFamily: IBM Plex Sans
    fontSize: 14px
    fontWeight: 400
    lineHeight: 1.3
  body-lg:
    fontFamily: IBM Plex Sans
    fontSize: 16px
    fontWeight: 400
    lineHeight: 1.15
  body-sm:
    fontFamily: IBM Plex Sans
    fontSize: 12px
    fontWeight: 400
    lineHeight: 1.3
  label-lg:
    fontFamily: IBM Plex Sans
    fontSize: 16px
    fontWeight: 500
    lineHeight: 1.3
  label-md:
    fontFamily: IBM Plex Sans
    fontSize: 14px
    fontWeight: 500
    lineHeight: 1.3
  label-sm:
    fontFamily: IBM Plex Sans
    fontSize: 12px
    fontWeight: 500
    lineHeight: 1.3
  headline-display-mobile:
    fontFamily: IBM Plex Sans
    fontSize: 42px
    fontWeight: 700
    lineHeight: 1.3
rounded:
  sm: 6px
  md: 8px
  lg: 10px
  full: 9999px
spacing:
  xs: 4px
  sm: 8px
  md: 9px
  lg: 20px
  xl: 36px
  gutter: 10px
  margin: 20px
components:
  button-primary:
    backgroundColor: "{colors.primary}"
    textColor: "{colors.on-primary}"
    typography: "{typography.label-md}"
    rounded: "{rounded.md}"
    padding: 7px
    height: 32px
  button-primary-hover:
    backgroundColor: "#8791FF"
  button-secondary:
    backgroundColor: "{colors.secondary}"
    textColor: "{colors.on-primary}"
    typography: "{typography.label-md}"
    rounded: "{rounded.md}"
    padding: 7px
    height: 32px
  button-secondary-hover:
    backgroundColor: "#059669"
  button-ghost:
    textColor: "{colors.on-surface}"
    typography: "{typography.label-lg}"
    rounded: "{rounded.md}"
    padding: 9px
  input-field:
    textColor: "{colors.on-surface-strong}"
    typography: "{typography.body-md}"
    rounded: 0px
    padding: 0px
  card:
    backgroundColor: "{colors.background}"
    textColor: "{colors.on-surface}"
    typography: "{typography.body-lg}"
    rounded: "{rounded.md}"
    padding: 24px
  link:
    textColor: "#474554"
---

# Highcharts Design System

## Overview

Highcharts describes itself as: “Highcharts JavaScript charting library: Core, Stock, Maps, Gantt, Grid and Dashboards. Build interactive data visualizations with modern frameworks like React.” The interface is light, built on **White (#FFFFFF)** with **Charcoal (#18171C)** text, and **Indigo (#626BD0)** as the main accent.

Type is set in **IBM Plex Sans** and **IBM Plex Sans Variable**. Headlines run large; body text is 14px. Depth comes from soft drop shadows. Corners are mostly 8px.

Measured from [highcharts.com](https://www.highcharts.com/) on November 4, 2026 at 1440×900 and 390×844 from 433 rendered elements. Values are computed styles from the live page, not the original source files.

## Colors

The palette has 13 roles, plus gradient stops #C61F25A6, #7F1D1DA6, #4A55C9.

- **White (#FFFFFF):** Page background, seen 6 times. Token `background`, CSS `--button-colors-attention-text-default`.
- **Charcoal (#18171C):** Primary text and headings, seen 38 times. Token `on-surface`.
- **Near Black (#000000):** Headings and emphasis, seen 3 times. Token `on-surface-strong`, CSS `--solo-default-placeholder-focused`.
- **Cool Snow (#F0F1FF):** Raised areas one step from the page, seen 1 time. Token `surface-container-low`.
- **Mist (#F2F1F4):** Cards and panels, seen 7 times. Token `surface-container`.
- **Near Black 12% (#0000001F):** Borders and dividers, seen 14 times. Token `outline`.
- **Mist (#E3E3E8):** Secondary dividers, seen 3 times. Token `outline-variant`, CSS `--HS-surface-ui-border-100`.
- **Indigo (#626BD0):** Brand color in the header, seen 7 times. Token `primary`, CSS `--icon-color-blue`.
- **White (#FFFFFF):** Text and icons on primary. Token `on-primary`.
- **Cool Graphite (#2F2E38):** High-contrast fills, seen 3 times. Token `inverse-surface`, CSS `--radiobox-text-default`.
- **Dark Teal (#047857):** Secondary buttons, seen 1 time. Token `secondary`.
- **Light Indigo (#8087E8):** Accent in the logo, seen 2 times. Token `tertiary`.
- **Deep Teal (#065F46):** Success and positive states, seen 1 time. Token `success`.

## Typography

**IBM Plex Sans** and **IBM Plex Sans Variable** share the interface. Fallback stack: `IBM Plex Sans, sans-serif`.

- **headline-display:** IBM Plex Sans 56px at weight 700, line height 1.3 (42px on mobile). Page title (h1).
- **headline-lg:** IBM Plex Sans 42.5px at weight 700, line height 1.3. Section headings (h2).
- **headline-md:** IBM Plex Sans 25px at weight 700, line height 1.3. Sub-section headings.
- **headline-sm:** IBM Plex Sans Variable 22px at weight 600, line height 1.3. Card and feature titles.
- **body-md:** IBM Plex Sans 14px at weight 400, line height 1.3. Body text.
- **body-lg:** IBM Plex Sans 16px at weight 400, line height 1.15. Lead paragraphs.
- **body-sm:** IBM Plex Sans 12px at weight 400, line height 1.3. Secondary and small text.
- **label-lg:** IBM Plex Sans 16px at weight 500, line height 1.3. Large buttons and tabs.
- **label-md:** IBM Plex Sans 14px at weight 500, line height 1.3. Buttons, navigation and labels.
- **label-sm:** IBM Plex Sans 12px at weight 500, line height 1.3. Small labels and badges.

## Layout

Spacing does not follow a strict grid: 48% of measured values are multiples of 4px, so match the measured steps rather than rounding to a grid.

- **Scale:** xs 4px, sm 8px, md 9px, lg 20px, xl 36px.
- **Gaps:** 10px is the most common gap in flex and grid layouts.
- **Page margin:** 20px on each side of full-width sections.
- **Breakpoints:** 375px, 781px, 782px, 850px, 1000px.

## Elevation & Depth

Raised elements use soft drop shadows. The most used recipes:

- `rgba(0, 0, 0, 0.1) 0px 0px 1px 0px, rgba(0, 0, 0, 0.09) 0px 1px 1px 0px, rgba(0, 0, 0, 0.05) 0px 3px 2px 0px, rgba(0, 0, 0, 0.01) 0px 6px 2px 0px`
- `rgba(0, 0, 0, 0.1) 0px 2px 8px 0px`

## Shapes

Most elements use 8px corners. Measured radii, most used first:

- **md (8px):** 100 elements.
- **sm (6px):** 64 elements.
- **full (9999px):** 20 elements.
- **lg (10px):** 16 elements.

## Components

Measured from the rendered page. Token values reference the tokens above.

- **button-primary (“Try for Free”):** #626BD0 fill, #FFFFFF text, 14px/500, 8px radius, padding 7px, border 1px solid #4A55C9.
- **button-primary-hover:** background #8791FF, text #FFFFFF on hover.
- **button-secondary (“Buy Now”):** #047857 fill, #FFFFFF text, 14px/500, 8px radius, padding 7px, border 1px solid #065F46.
- **button-secondary-hover:** background #059669, text #FFFFFF on hover.
- **button-ghost (“Products”):** transparent fill, #18171C text, 16px/500, 8px radius, padding 9px.
- **input-field (“Email address”):** transparent fill, #000000 text, 14px/400, padding 0px.
- **card:** #FFFFFF fill, #18171C text, 16px/400, 8px radius, padding 24px, border 1px solid #E3E3E8.
- **link:** transparent fill, #474554 text, padding 0px.

## Do's and Don'ts

- Do use #FFFFFF for the page and lift surfaces in small steps: #F0F1FF, #F2F1F4.
- Do keep text in 2 levels: #18171C, #000000.
- Do use #626BD0 as the brand accent: header, logo and key highlights.
- Do reuse the measured spacing steps (8px, 9px, 20px).
- Do use 8px corners on most elements; larger surfaces also use 6px and 10px.
- Don't introduce new font families beyond IBM Plex Sans and IBM Plex Sans Variable.
- Don't use #626BD0 for large backgrounds or body text.
- Don't make interface transitions slower than 0.4s.

## Motion

Interface transitions are quick: 0.2s, 0.1s, 0.4s, 0.3s.

- **Easing:** `cubic-bezier(0.075, 0.82, 0.165, 1)`, `cubic-bezier(0.6, 1, 0.2, 1.2)`, `ease-in-out`.
- **Reduced motion:** the page responds to `prefers-reduced-motion`.

Generated by [Sitepeel](https://sitepeel.dev/design-md/highcharts.com/), the free DESIGN.md generator (engine 2026.10.29+b828a475ee10).

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