Atom Code Editor. Why is my code not in color?

Atom might not be recognizing the syntax of your code immediately. Check the bottom right corner of the screen to make sure atom has the correct language/file extension selected. You can manually select this if atom doesn't do it automatically. You might also need to install some new packages if atom isn't recognizing your code.

Use ctrl+shift+l to open the language selector, and select the auto-detect option.