Answer 1

They have no specific meaning to just anyone. Only the person who set up the editor with different colors knows what color that put for what syntax.

You can change the colors of most editors (except on SoloLearn, from what I know).

Recap: 1. Colors are different for every person or editor, they have no set meaning.
2. Here on SoloLearn different syntax has different colors (also depends on the language on here).
3. Editors where you can change the colors abound: Atom, Notepad++, Sublime, etc.

Hope this helped!

Gud Luk!

-bErN