How can i apply color to folder notes created with folder notes plugin

I am trying to color folder notes possibly a background color, how can i do that.
This should apply to all the notes within the folder, The only logic required is that the name of the file should match the name of the folder.

.nav-file-title[data-path$=".md"] .nav-file-title-content:before {
  content: '';
  display: inline-block;
  heigt: 14px; 
  width: 20px; 
background-color:  yellow;
  background-size: contain;
  padding-right: 8px;
}