I’m not really sure what you mean by topics. I can help you with the menu color though.
Open the theme folder, find the file named “style.css” open it in a text editor. After that scroll to line 167, around here you’ll find CSS that looks like:
#access {
background-color: #373737;
background-image: -moz-linear-gradient(top, #333333, #222222);
background-image: -ms-linear-gradient(top, #222222, #000000);
background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#222222), to(#000000));
background-image: -webkit-linear-gradient(top, #222222, #000000);
background-image: -o-linear-gradient(top, #222222, #000000);
background-image: linear-gradient(top, #333333, #222222);
background-repeat: repeat-x;
z-index: 99999;
}
Change it so that it looks like:
#access {
background-color: #000;
z-index: 99999;
}
You should be all set as far as the menu. If you could help me understand what you mean by topics, I would be glad to help you.