Salesforce's CRM design system: the #0176d3 brand blue on white cards over a #f3f3f3 canvas, Salesforce Sans type at a dense 13px base, compact record pages built from bordered cards, tabs, and data tables, and a styling-hook (CSS custom property) architecture that lets admins theme without breaking components.
Primary actionThe Lightning record page: a white page-header card with an object icon, title, and action buttons, floating over the #f3f3f3 canvas above a grid of bordered, flat detail cards packed with label/value field rows.