Hi
It will require lots of change, I recommend to use Inspect Element in your web browser : https://blog.hubspot.com/website/how-to-inspect
.nspMain.mod-hover-animation .nspArt:hover {
background: #06131f;
color: rgba(255,255,255,0.6);
z-index: 2;
}
then you can override this background color with:
.nspMain.mod-hover-animation .nspArt:hover {
background: #06131f !important;
color: rgba(255,255,255,0.6) !important;
}