How do I change the colours, fonts and logo (theme)?

Branding lives in two places. Appearance settings control your personal light/dark mode and density. Brand Studio controls the company-wide identity: primary and accent colours, logo, and the loading animation. Fonts adapt to language: English uses a left-to-right font; Arabic and Kurdish Sorani are right-to-left with configurable fonts (such as Rudaw, Kurdistan25 or Nalia), or you can upload your own. Changes to Brand Studio apply across the company's screens. Each company can have its own branding, which is part of what makes tenants feel like separate products.