Style Portfolio Grid

Hey there,
I’m working on a new project, where I need to custom-style the portfolio grid.
The images themselves have a white background; so, naturally, I’d like the background of the portfolio title below, etc. to be white as well. In other words, both icons and title background below should share the same white background and thus, appear to be one element.
My second question is how I would need to go about changing both font size and font color of the portfolio title.

Many thanks for your time and help with this. I really appreciate it.