One of the things that you can do is to go into the CSS file (Theme Editor --> Stylesheet) and look for things like this...
This is the code you will change.
Do not change anything else or remove the pound sign or semicolon.
You will need a list of colors in hex values. Visibone (do a google search) has a nice chart you can use.
If you want to make it another color you'd type
or whatever you need.
Does that make sense?
If not, let me know and I'll go into more detail.