Is your feature request related to a problem? Please describe.
The design reduces the light emitted by device screens while maintaining the minimum color contrast ratios required for readability. The advantages of Dark Mode are, it enhances visual ergonomics by reducing eye strain, facilitating screens to adjust according to current light conditions and providing comfort of use at night or in dark environments.

Describe the solution you'd like
The themes are activated by CSS classes on the root element, . When the page is loaded, I want to apply the theme that most likely suits the visitor (you!) best. After all, most people don’t like configuring websites before they can read a blog post, so the the whole theming feature would likely remain unused otherwise. So I have to make a guess about what the visitor wants and expects.

Describe alternatives you've considered
When a visitor navigates from page to page, the theme shouldn’t change. That’s why I save the state of the theme selection, so it can be loaded by the next page.