If you are going to try to make a new Theme and want to change colors to the .kmtf file.
I have been using this website to check what colors I want to change.
It is a very simple website to see what colors look the best.
The Basic Colors and next to them are the Shades and Mix[/COLOR].
You can take any of the .kmtf files and user the notepad to edit them.
Example: This was Navigon.kmtf I have been working with
<?xml version="1.0" encoding="UTF-8"?>
<TITLE>Asprin624</TITLE> <----- you name here or what name you want to use
<DESCRIPTION>Theme for Asprin624 (Asprin624).</DESCRIPTION> <--- and here then save it to the same name.
<STYLE field = "MAP_BEACH_CLR" >
<PRIMARY day = "#E8C455" night = "#67491D" /> Daytime color you want to change
<STYLE field = "MAP_BUILDING_CLR" >
These files are very long so it will take some time to edit them and test.