I have been working on a writing project for years and am annoyed to find that Scrivener ONLY Types Red text.  I found out how to correct this.  Open Scrivener and put your mouse over the top far left and over the words Scrivener.  A drop down menu should appear and from that menu select “Preferences”.  When that new window appears on your computer screen select the second top tab at the top of the window with the label “Appearance”.  The window will change to show an image quite similar to the one shown below.  Take special note of the bottom of that menu window.  It is called “Customizable Colors”.  Scroll down to select the menu option “Revision Colors”.  To the right a color window will show you the current color for the revision change.  You can change that color.