Source Sans Pro

Source Sans Pro is a sans-serif family with a broad range of weights and both normal and italic styles. Its clean, readable structure makes it well suited to everyday interface text, documents, and informational layouts where clarity needs to remain consistent across different sizes and levels of emphasis.

Best suited for: Use it for websites, app interfaces, navigation, forms, reports, presentations, and editorial text. Regular and medium weights can handle longer passages, while heavier settings help distinguish headings, labels, buttons, and important notices without changing the overall family.

Design considerations: The six weights run from very light to very heavy, giving you room to build a clear hierarchy. Lighter settings may work best at larger sizes or in spacious layouts, while regular and semibold weights are safer for sustained reading. Bold and black styles suit strong headings; italics add emphasis or separate supporting information.

Pairing guidance: For a restrained system, pair it with a serif that has visible contrast and comfortable text proportions. A humanist sans-serif can add subtle distinction without creating a sharp change, while a condensed display face may give headlines more impact. Keep the companion font limited to selected roles so Source Sans Pro remains easy to follow.