1. In the Chrome browser, when browsing the official Swoole documentation, the background color of the text selected with the mouse is too light—a grayish blue—resulting in insufficient contrast with the text color, as shown in Figure 1.
2. Open the Chrome extensions page to get more extensions, as shown in Figure 2.
3. Search for Stylish in the Chrome Web Store, and add Stylish – Custom themes for any website to Chrome, as shown in Figure 3.
4. Go to the options for Stylish – Custom themes for any website, as shown in Figure 4.
5. Write a new style and apply it to the URL prefix: https://wiki.swoole.com/ , as shown in Figure 5.
6. Refresh the URL: https://wiki.swoole.com/ . The background color of the text selected with the mouse has now been adjusted to dark blue, and the text color is white, providing clear contrast, as shown in Figure 6.
