Remove Spacing From The Top Of The Gray Title Boxes

For my website, I would like to remove space from the top of the gray title boxes on the home page / category pages / etc so that the titles move up closer to the image and so that less space is "wasted" vertically. I have attached an image to show what it looks like now vs what I would like for it to look like. Please advise how to do this.

I have granted support access via the wpmu plugin, in case that helps.

Thanks for your help!