grey background color

We need to override some of the theme’s style rules. Enter this in the theme’s custom CSS section if it offers one, or via a plugin like Simple Custom CSS.

.strong-container .testimonial {
  background: none;
  padding: 0;
}
.strong-container .heading {
  line-height: 24px;
}

Thanks Chris. That’s much better.

That worked in the theme’s style CSS, but not in Simple Custom CSS.

The problem with adding it to style.css is that theme upgrades will overwrite it. You may need to simply flush your browser cache for it to work in Simple Custom CSS. And there are alternate methods; let me know if you want to try.