How to change slideshow background?

Hello!

I have a little problem. While customizing the colors of the theme, i’ve noticed that by changing ‘Hover Menu Item’ color it changes the logo area as well as slider/slide-show background color. I’d like to separate them so i could set different colors to different areas of the page. I’ve looked allover for it in the style.css, but no luck. It seems to me that these variables are set somewhere in php file, but i’m not that advanced. By looking at page source i can see the

#slideshow {
    background:#dbdbdb  url(https://stingas.lt/wp-content/themes/exclusive/images/page.bg.png) center center no-repeat;
}

but have no idea where to change it. Any help is much appreciated.