Not sure how to install gtkmm,glibmm,libglademm

[Zhou Xiyuan <clozxy gmail com>]

Hi gtkmm group,

  How are you going?

  I am a new linux developer, I want to install glibmm, gtkmm, libglademm into my Fedora 6 OS, but I am not sure which version of those software I should choose,
and I find a dependency graphs for gtkmm at URL "http://www.gtkmm.org/jhbuild_dot_gtkmm.png",

1. Can you tell me what is difference between blue shape and yellow shape, (does yellow mean not necessary?)
2. Can you give me a suggestion what version I should choose for glibmm, gtkmm and libglademm, or any other libs necessary?

Thanks and Best wishes,

zhouxy from china