Dark mode has become a highly sought-after feature across web, desktop, and mobile applications, prompting many UI libraries to incorporate it to enhance user and developer experiences. Several popular UI libraries, including Material UI, Vuetify, and Nebular, offer seamless dark mode integration, allowing developers to easily toggle between light and dark themes to suit user preferences. These libraries provide extensive theming facilities and customizable interfaces that are well-received by developers, as evidenced by their popularity on platforms like GitHub. Furthermore, libraries like Chakra UI and Smelte offer straightforward dark mode configurations, while Tailwind CSS and Quasar provide plugins to facilitate dark mode implementation. On mobile platforms, Ionic and React Native Paper have also embraced dark mode, highlighting its importance in modern app design. The widespread adoption of dark mode underscores its role in improving user experience and simplifying developers' workflows.