Full Sidebar background color bleeding

Hey guys, I have a small problem with my sidebar. I wanted to have a background color in the whole sidebar with my widget, as you can see in the links below. I found this code in another thread which I am using:

.sidebar *{
color: black;}

@media only screen and (min-width: 768px) {
    .container_wrap.sidebar_right{
        background:-webkit-gradient(linear,right top,left top,color-stop(#f8f8f8,0.295),color-stop(white,0));
        background:-webkit-linear-gradient(right, #f8f8f8 29.5%, white 0%);
        background:   -moz-linear-gradient(right, #f8f8f8 29.5%, white 0%);
        background:     -o-linear-gradient(right, #f8f8f8 29.5%, white 0%);
        background:        linear-gradient(right, #f8f8f8 29.5%, white 0%);
}

My problem is that the background color is bleeding past the sidebar separator. I’m not sure if it has to do with the styling of the sidebar title, or some other conflicting code. Please let me know what I can do to fix this. Thanks!