The ability to let your website adjust to the user's theme of choice is a great accessibility feature.

Open-source software communities and projects provide developers with opportunities to collaborate, contribute, and learn from a diverse range of projects across various domains. From exploring source code repositories to participating in community discussions and events, developers can gain hands-on experience and expand their skills while contributing to the advancement of open-source software. Additionally, engaging with open-source projects fosters collaboration, knowledge sharing, and innovation within the global developer community, driving the evolution of technology and fostering a culture of transparency and collaboration.

Open Source Way

The prefers-color-scheme media query works the same way. The user can configure their operating system to use a light or dark theme. I specify different values of CSS variables for both modes and let the user's OS decide. This is the real power of the media query: Providing a consistent user experience from OS to web page.

A simple CSS trick for dark mode | Opensource.com