UI Skillbook
2

Design systems set in Source Sans 3

Brands and apps whose DESIGN.md names Source Sans 3 as a typeface, including Coursera, Charles Schwab and ACTUS（アクタス）. Each file also lists the sizes, weights and colors that go with it, so your coding agent can match the whole style.

3 files

Files

Coursera

Brands · Source Sans 3

Online learning with marketplace breadth, academic trust, and blue-led clarity. Coursera's public site uses a clean sans system, white and pale-blue surfaces, structured category browsing, and strong Coursera blue…

Charles Schwab

iOS apps · Source Sans 3

The Charles Schwab iOS app is the digital lobby of a 50-year-old brokerage — confident, trustworthy, and built to make handling six- and seven-figure accounts feel safe rather than thrilling. Where a fintech…

ACTUS（アクタス）

Japan · Source Sans 3

株式会社アクタス（ACTUS）コーポレートサイト（https://www.actus-interior.com/）のデザイン仕様書。 1969 年創業、輸入家具・インテリアのライフスタイル提案型セレクトショップ。 実サイトの computed style 実測（2026-05-07 取得）に基づく。

Other fonts