Accordion Toggle Border Remove, Change Color

Hello, I need to remove the hideous border around the toggle items or change the color so it won’t show to #d5d9d4 instead. But if I change the color of the border, then will the plus sign in the box also change?

I’d rather get rid of it.

I was able to get rid of the top and bottom border, but the left and right side is still there.

.toggler {
border-top: none!important;
border-bottom: none!important;
}

The element is on the page in the private section.

And while we’re at it – is there a way to get rid of the box around the plus sign?

Thank you so much!!