CSS Change username color for entire Custom Groups, works sometimes then doesn't?

Development
8

I’m probably not the best one to ask as I can make things work but not necessarily explain why. But what I’m currently using and works fine

.topic-post.group-Veeps div.names span.username a {
   color: #66FF00;
 }

Obviously swap “Veeps” for whatever usergroup you have that’s just what mine is named.

.names span {
  &.group--Veeps a {
    color: red;
  }
}

As mentioned above also works I just swapped it for what I had. I’ll probably install the plugin he just posted though for convenience either way