The Inngest team has introduced a new feature: dark mode, which allows users to toggle between light and dark modes. This update was made in response to user feedback and research showing that color modes are becoming increasingly important for UI/UX design, addressing accessibility needs, reducing eye strain, and enhancing readability. The team also created a token-based color system using Tailwind CSS and CSS variables, which provides flexibility and consistency across interfaces. The implementation involved defining design system colors and tokens in a CSS file and integrating them into the Tailwind configuration. Despite some challenges with compatibility and legacy styles, the team took an incremental approach to updating the codebase, leveraging tools like Figma's Variables to streamline the process. The theme switcher uses next-themes, allowing for easy implementation with a ThemeProvider component and a useTheme hook.