How do i change the color assigned to a category?

[Millermark]

I'm working with Coppermine 1.3.x. I don't know much about coding so forgive my ignorance i'm trying to learn as i go. I haven't found anything related to this in any of the forums, but forgive me if i missed it.

I have suceeded in modifying the default theme to my client's colors. The issue i'm having is this: when i create new categories and then need to move them up or down in order to make them alphabetical, there is a color assigned to the background for that category entry. So, when the album list is viewed, instead of alternating colors, i have a few entries with alternating colors and then several with the same color. It seems that when the category is created, a color is assigned to the background and stays with it no matter where in the lineup i put it. I need to make the colors alternating. I'm hoping that i'm just missing something obvious. If i'm not making sense, take a look at http://www.riverregionchamber.org/gallery/ and hopefully it will be more clear. Thank you in advance for your help and patience!

[Aditya Mooley]

The emtpy categories are looking striped and the categories wth atleast one album in it has white background.
So either assign different class to the empty categories or edit the existing class "tableh2" to match your needs.