[utility] Change colour blue to bold blue
[utility] Change colour blue to bold blue

Since some terminal colour schemes have a too dark blue color that does
not go well with a black background. And since some people actually use
such colour schemes!  :- )

Fixes #225

joshuarubin/dotfiles,joshuarubin/dotfiles,joshuarubin/dotfiles,joshuarubin/dotfiles,Eriner/zim