CSS for title in Portfolio Grid doesn't work

Hi friendly support,

I’m having trouble with the following piece of shortcode which I found on https://kriesi.at/documentation/enfold/portfolio-grid/#title-and-background:

/* Font */
.grid-entry .grid-entry-title {
color:#7d3f98;
background: transparent;
font-weight: 800;
}

I’ve added it to my Quick CSS with the color code #212121 (almost black) but the title is still white. I tried looking in the code and it seems that the title is an H3 element, so I tried changing the color of my H3, but that doesn’t help either.

I’ve included a login in private content, if you need to take a look at my site.

Can you please advice?

Thanks in advance,
Yth