Oxygen & Source Sans Pro font pairing

Pair Oxygen for headlines with Source Sans Pro for body copy when you want clear UI hierarchy. Oxygen carries display weight and brand voice; Source Sans Pro keeps paragraphs and helper text readable at smaller sizes. Download both from Google Fonts and test at 16–18px body with a bold or medium heading scale.

• Landing heroes: Oxygen at large sizes, Source Sans Pro for supporting sentences and CTAs.
• Product UI: keep Source Sans Pro for forms, tables, and settings; reserve Oxygen for page titles and empty states.
• Portfolios: use the contrast between Oxygen and Source Sans Pro to separate case-study titles from captions.