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.
Code:
http://www.w3schools.com/tags/ref_colornames.asp
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"?>
<GARMIN_MAP_THEME>
<METADATA>
<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.
<LOCALELIST>
<locale>vonHarold</locale>
</LOCALELIST>
<Version><Major>2</Major><Minor>20</Minor></Version>
</METADATA>
<PRESENTATION ID="Guidance">
<STYLELIST>
<STYLE field = "MAP_BEACH_CLR" >
<COLOR >
<PRIMARY day = "#E8C455" night = "#67491D" /> Daytime color you want to change
</COLOR>
</STYLE>
<STYLE field = "MAP_BUILDING_CLR" >
These files are very long so it will take some time to edit them and test.
later Asprin624