mdrasin on "Space between paragraph & UL"

For 2013 theme.

How would I decrease the space between a paragraph and an unordered list below it?
Basically, I have:
"text blah blah.
(then I have this break, which is what I want to shrink, but not eliminate altogether)
then the ul here"

I guess I would just need to decrease the paragraph bottom margin or top margin of the ul, but I'm not sure where in the stylesheet this would be, since the paragraph css only stipulates both bottom and top margin.

p {
margin: 0 0 24px;
}

Thank you!