Change background color from grey

Hello:
I want to change the gray background to a brown one when it moves from one slide to the next in image show. How can do this? Thanks.

HI,
Could be more concrete, in which module style ?

Because all styles are located in different folders (modules/mod_image_show_gk4/styles/....)

For example : styles\gk_appsprotech\style.css there you will find background colors

Sure, modules/mod_image_show_gk4/styles/gk_game_magazine
Can you please let me know which lines to change in the style.css there?

For background color we use : background:#101010; if you're talking about dark gray ?

line 12 & 13

That doesn't seem to work for me. Please see the site at: http://www.vedics.org
I would like the gray bar on the text of image slide show to be a yellow color. Which line of css do I change?

Thanks.