Bad styled table

Hi, I think something is wrong with my table.

Can you give me the css to:

• … have the header with background as in settings for every column
• … have a row border for every row header included in color of the header background
• … change text colors of alle column headers

<img src=”http://digiblogger.de/screenie.jpg”&gt;

https://wordpress.org/plugins/leaguemanager/