You don’t have to say sorry I think we all understand that you have been swamped since you released the 2.0 styles.I'm usually better at responding Ruby, I'm sorry this thread slipped by!
The hex color itself is: #3f9889,
By default, it inherits from @linkColor via Style Properties -> Basic Colors, although I like the idea of a property for node titles as they get changed quite often. It'll be in the next release.