Eclipse Kepler change tree selection color or background CSS

Question

In Eclipse Kepler on Linux Mint, selecting items from a tree-view like the Project window is pretty straightforward:

But on the Searches window, matches and potential matches have no background color when you select them. Hence, they become invisible:

How to I change the color of selected text there? I'm guessing it defaults to a system color, but for most other colors you can override that.

In Eclipse Juno this was not a problem, because the selection background color was, like in the Project Window, the same as the system default:

I think that in Kepler the system default background is not working in the Searches window because they forgot to implement it after manually allowing the contents of the tree view to have a different color from the system color specifically for potential matches:

Unfortunately, they didn't add options to change the definite matches and the selected matches color here, otherwise I would probably have figured this out myself. ;)

edit I figured out how to change the background-color of the entire Tree:

Tree {
  background-color: #f00;
  color: inherit;
  background-image: none;
}

But I cannot change for the life of me the color or background of single items. At all. In the end, I'd like to change the background for the selected item so it becomes readable.

Just trying a bunch of stuff, but not working:

.TreeItem:even,
.TreeItem:linesvisible,
.TreeItem:selected,
.TreeItem:unfocused,
.Tree-RowOverlay,
.Tree-Cell,
.Tree-GridLine,
.Tree-Indent {
  background-color: #0f0;
  color: #f00;
}

---

Note - In the Kepler screenshots I use the Jeeeyul's Eclipse Themes plugin to change some of the hideous unbelievably terrible design decisions the Eclipse team made for Kepler, but this is unrelated. The font, the colors and the problem of the selections are the same with or without the plugin.