CircuitLab Brand Identity

A complete profile of CircuitLab's visual system — colors, typography, components, and personality — extracted from https://www.circuitlab.com/. Built for designers, agents, and AI tools.

• Page: https://characterquilt.com/branding/circuitlab
• Machine-readable JSON: https://characterquilt.com/branding/circuitlab.json

Quick Facts

Color Palette

• primary: #4A5B68
• secondary: #5BB75B
• accent: #5BB75B
• background: #FFFFFF
• textPrimary: #0088CC
• link: #0088CC

Typography

• primary: Helvetica Neue — https://fonts.google.com/specimen/Helvetica+Neue
• heading: Palatino Linotype — https://fonts.google.com/specimen/Palatino+Linotype

Visual Assets

• Logo: https://www.circuitlab.com/assets/images/topbar_logo_60_2x.png
• Favicon: https://www.circuitlab.com/assets/images/favicon.png
• Social card (og:image): https://www.circuitlab.com/assets/images/og_logo.png

UI Components

• input: background=#FFFFFF, textColor=#FFFFFF, borderColor=#111111, borderRadius=6px, shadow=rgba(0, 0, 0, 0.1) 0px 1px 2px 0px inset, rgba(255, 255, 255, 0.15) 0px 1px 0px 0px
• buttonPrimary: background=#5BB75B, textColor=#FFFFFF, borderColor=#E6E6E6, borderRadius=6px, shadow=rgba(255, 255, 255, 0.2) 0px 1px 0px 0px inset, rgba(0, 0, 0, 0.05) 0px 1px 2px 0px

Brand Personality

Tone: professional · Energy: medium · Audience: engineers and electronics enthusiasts

CircuitLab Brand in the Wild

Real-world brand assets — ads, campaigns, marketing materials.

• Blog - CircuitLab
  • Image: https://s3.amazonaws.com/circuitlab-images/misc/20120608-nerdkits-sous-vide-cooker-schematic.png
  • Source: https://www.circuitlab.com/blog/16/
• Blog - CircuitLab
  • Image: https://cdn.circuitlab.com/misc/20210127-live-dc-demo.gif
  • Source: https://www.circuitlab.com/blog/
• Documentation - CircuitLab
  • Image: https://cdn.circuitlab.com/misc/2021-04-14-simulation-troubleshooting-parameter-2.png
  • Source: https://www.circuitlab.com/docs/simulation-troubleshooting/
• CircuitLab Conquering Classrooms - Blog - CircuitLab
  • Image: https://s3.amazonaws.com/circuitlab-images/misc/20121029-upenn-electronics-lab.jpg
  • Source: https://www.circuitlab.com/blog/2012/10/29/circuitlab-conquering-classrooms/
• CircuitLab in Google's Chrome Web Store - Blog - CircuitLab
  • Image: https://s3.amazonaws.com/circuitlab-images/misc/20120403-chromewebstore.png
  • Source: https://www.circuitlab.com/blog/2012/04/03/circuitlab-in-googles-chrome-web-store/
• Basic Math, TRMS, AVG, Mean - CircuitLab Support Forum - CircuitLab
  • Image: http://i.imgur.com/YrqEcX4.png
  • Source: https://www.circuitlab.com/forums/support/topic/uz58jnx8/basic-math-trms-avg-mean/

Working with these fonts

Not found on Google Fonts?

CharacterQuilt.com suggests this flow that can help:

1. Open the company's homepage in a browser with DevTools open.
2. In the Network tab, filter by "Font" (or by extension: woff2, woff, ttf, otf).
3. Hard-reload the page and click around (pricing, blog, careers) — some weights only load on specific routes.
4. For each captured font URL: right-click → Save As to download the file locally.
5. View the page's CSS (DevTools → Sources, or curl the stylesheet URLs) and copy out the matching @font-face declarations. Rewrite each src: url(...) to point to your local file path.

Programmatic alternative: load the URL with Playwright or Puppeteer, listen for response events whose Content-Type starts with font/, and write the body to disk. The CSS extraction step is the same.