This is a plugin for dokuwiki.
It will enable syntax to set cell background in tables.
It also can create borders around a cell:
Examples:

| @#0000ff: cellcontent |   -> blue cell background
| @transparent: cellcontent | -> transparent cell background
| @#00ff00[]: cellcontent | ->green cell background AND Border around cell

To install this plugin: 
1. Download this repro as zip
2. Go into Dokuwiki as admin
3. Install plugin manually -> select downloaded zip file