Chris Coyier is the founder of CSS-Tricks, and also a co-founder of CodePen. His tools have been used by web designers and developers for over 15 years.
Rachel Andrew is a co-founder of Perch, which is a PHP-based content management system. She is also well known for her contributions to CSS, in particular CSS Grid.
David Walsh is a senior developer at Mozilla and is known for his tutorials and articles on various Web Development topics.
Wes Bos is a web developer and educator who is well known for his tutorials and online courses. He often covers JavaScript related topics, like React and Node.js.
I came across this article from David Walsh that shows you how to create a "Dark Mode" effect with only one CSS property. It simply inverts all of the colors of a selected element, so applying this to the HTML element would allow you to create dark pages out of lighter ones, and vice-versa. It is not a true dark mode solution in most cases, however it is an interesting visual effect.
This trick was so easy to implement, that I created a little script which allows you to change this page's colors if you just
Perhaps I could use this trick as a baseline for what different elements could look like in dark/light mode if I ever wanted create a project that toggles these colors.