Using blend modes in eww

[LunaeSomnia]

Hello everyone!

I've been using eww for a while and wanted to implement my own design. I wanted to use the css rule background-blend-mode and it seems like it does nothing. I've checked the GTK Css Properties and it seems to be implemented.

My code looks something like this:

.panel {
  background: #fff;
  background-blend-mode: soft-light;
  border-radius: 4px;
  padding: 4px;
  min-width: 24px;
}

It looks like this:

And should look like this:

What am I doing wrong? Does eww not implement it?

Thanks all.