Dark Mode
You might say
Add real dark mode: text, borders, charts, and code blocks must switch with the page.
Dark mode is a switchable dark interface theme state, not merely a page with a black background.When someone chooses dark mode or their system prefers it, backgrounds, text, borders, buttons, charts, and focus states need coordinated, sufficiently contrasting values. It serves different environments and preferences. A single dark poster or visual style is not automatically a switchable theme.
Also calledDark Theme
Further reading