In this chapter, you learned about using CSS to theme a web page with new colors, backgrounds, and borders. By adding a small CSS file on top of an existing CSS design, you were able to easily create four different versions of a web page using nothing but CSS properties and values that you applied to your existing markup.
First, you created an inverted dark theme using Hex values for complementary colors of the colors in the original theme. Next, you used HSL colors to create a more polished theme, where design considerations trumped pure complementary values for the colors in the theme. Next, you used the invert filter to create a quick-and-dirty inverted theme. Finally, you created a post-specific theme by taking advantage of the hooks that a good CMS such as WordPress provides to be able to style individual pages.
In the next chapter, you'll learn about some very important technologies for today's modern, many-device web – Media Queries and Responsive...