Help with CSS from custom template

[cudaboy71]

This is a 3rd party template purchased by my client. I'll admit right now, i'm not great at CSS. The stuff i write for my own projects is way simpler than this. Can someone help me deceipher the code so i can make the changes i need?

My goal here is to change all of the shades of blue to shades of maroon.

have a look at the sample html:

http://www.hotheli.com/temp

to illustrate what i'm hung up on:

i see the css styles going from DT Main->DR->DC->DT L1->DR->DC (that's the way the styles cascade down to the first graphic "logo.gif". So, i'm thinking that somewhere in one of those styles should define that blue gradient surrounding the 'logo.gif'. yet, when i look at the CSS the only color i see called out is 353434, a shade of black.

any help would be appreciated. thanks.