Hello Jacob,
Thanks for the information. I have tried to do this and can't quite get it to work. I also discovered that I needed to change the template.css to add yellow to it as well. However, even that was not enough. I only get the left side of the tab to show up in yellow but, the rest is in grey, which doesn't make any sense.
I'm attaching a file to show you what it's doing. I did notice that there is a params.ini file in the original zip file but, not on the website. The params.ini file has a list of colors, which yellow is not part of. Could that file be responsible for some sort of other changes in the system that would affect this?
Looking forward to your response. Thanks again for the help.