openSuse linux 10.3, eclipse 3.3.1
You should be able to edit the color syntax for the ivy editor just like you can for the base xml editor.
Ivy XML editor uses hardcoded syntax coloring
This is an important feature for people who use different color schemes either for visual comfort (e.g. using a dark background) or because they have some disability (e.g. color blindness). An alternative to having IvyDE specific color preferences would be to use the XML editor preferences.
I have added some new preferences in the global IvyDE preferences page.