Someone help PLEASE!

Guys im using the industrialthemes flavor and Im desperately trying to change the featured bar shadow… well the background.
heres my website:
http://www.vitamits.com
its not ready yet however im trying to change the black background on the slider, i’ve been researching for a whole day and couldnt find any solution. I used mozilla firebug to help me find and it told me it was the featured bar shadow on the stylesheet, so I went there found it but idk what to do with I just want to change the color.
im fairly new to all the website concept.
Thanks.