I'm not sure about the tutorial, but most likely you will want to do this: Mx customize
then go to the "Faces" section - you will get a bunch of settings related to the color scheme and other font related settings.
But Emacs has a lot of settings related to how the text is displayed. I use this http://www.nongnu.org/color-theme/ , but you can find a lot of information here: http://emacswiki.org/emacs/ColorTheme (emacswiki is basically a resource that you need to first familiarize yourself with when you have a problem with Emacs).
Obviously, you can do this in your .emacs file by adding different settings, but I would suggest to first use what is generated by the changed settings, see how it works, and then add it on top of it yourself (after you change the settings from the settings buffer, it will save the changes to the .emacs file - you can open it and see what exactly it did).
user797257
source share