Smooth Navigational Menu - changing dropdown list colour & transparency

[caterpillar]

1) Script Title: Smooth Navigational Menu (v1.5)

2) Script URL (on DD): http://www.dynamicdrive.com/dynamicindex1/ddsmoothmenu.htm

3) Describe problem: Hi - this script is near enough perfect for that I need. However, is there a way to change the colour of the dropdown without changing the colour of the horizontal menu? is there also a way to make the dropdown slightly transparent?

Many thanks in advance.

[vwphillips]

.ddsmoothmenu ul li ul li a{
background-Color:red;
}

.ddsmoothmenu ul li ul li a:hover{
background-Color:blue;
}