First question => How can I copy the same border/color on widgets (Sidebar)
Second question => How can remove the darkblue line just under the categories like the image I sent you so just under "last threads" just over the border.
I already checked there and when I change the font color, it changes the one betweek widgets but not the header (title) or content...
Is there any possibility to force the change via the stylesheet => extra.css ?
I'm 100% sure he's not ignoring you. He just has a busy life.
Regardless, when it comes to third-party add-ons and styles, it's best to ask in the dedicated support threads for support. There are other people who can help you other than the add-on or style author.