Removing dark effect off "Ready to Fight"?

[Unit]

I've seen other custom css achieve this method, but I haven't been able to do this myself. I was wondering which file would I need to edit in the sc_selcharacter.pac to remove the dark shading when the "Ready to Fight" bar appears.

Here's the example:



I'm trying to keep my CSS screen to remain just like this, when the "Ready to Fight" bar appears.



Here's an example of Project M's CSS removing the dark effect to make it a little more clear of what I mean: