I have an HTML file with a subdirectory called img with an image called debut_dark.png. In my CSS file, I have:
body {
backgro
You have to use a relative path in the URL. I think you made two folders in the root directory where your index.html resides. One is 'CSS' folder & another is 'img' folder.
Now, if you have to access 'img' folder in css files. So you have to go back once in root directory using "../" syntax. Then move to the 'img' folder using "../img" syntax. Then write the image name "../img/debut_dark.png".
body {
background: url("../img/debut_dark.png") repeat 0 0;
}