Report (PDF) Header Background Fill Color Not Extending to Bottom of the Space

The background fill color on the header is not filling the entire space when viewed in PDF. You can see on four of the six columns there is white space where the text is shorter. I need the teal color to fill to the bottom of the header space, and not just exist where the text is located. It works fine in excel and cube view. The issue only exists in report PDFs. Does anyone know of a way to accomplish this?

Report/PDF:

Excel: 

Cube View:

Here's an example of a PDF that looks good because the length of the header text is more comparable across the columns:

 

I'm sure there's a way to accomplish this through a Custom Report Formatting rule or formula. I'm trying to avoid this, as I feel the formatting should already default to what I want. But, if I have to go this route, I will.

Thanks in advance!