If you open a Moi session without load an object
the default style must be loaded with the 7 colors by default!

If you open an object where you have modified the color style, you will have your previous style saved :)

That will be be not more simple! :)

So without coding the .ini file if you want a particular Default style list colors, just saved a simple cube at the origine with your color style parameters wanted
You will just kill it if you don't want it and you will keep your custom default color style!
Not a big deal :)