Hi James,

you can't change it with css.
NE have a hidden feature which highlights inputs and outputs titles. Alt+Left click on Info button (left upper corner).
In the next version I'll add an ability to switch it using a color scheme settings (colors.js)

>>Also in most cases it seems redundant to label outputs, but even more so, if they are coloured.
I need to think about it. We can't hide all output titles.

UPD:
http://moi.maxsm.net/files/nodeeditor/ne.colored.dots.and.titles.zip

1. replace colors.js and main.js with this files
2. set "io_text_highlight" and "io_highlight" parameters in colors.js