It took a little effort to untangle what Chameleon has done... they tried to hide it all, but ultimately, everything that exists in a TiddlyWiki can be viewed.
The following will reproduce the sidebar TOC tab:
1) Create a tiddler named "TOC", tagged with $:/tags/SideBar, containing:
<ul>
<$list filter="[tag[TOC]]">
<li>
<$link>
<$macrocall $name="tag-pill-body" tag=<<currentTiddler>> icon={{!!icon}} colour={{!!color}} palette={{$:/palette}} element-tag="""$button"""/>
</$link>
</li>
</$list>
</ul>
2) Create a tiddler with any name you like, tagged with "TOC"
3) Add a field named "color", leave the value blank for now
4) Press "done" (checkmark) to save the tiddler
5) Press "edit" (pencil) to re-edit the tiddler
6) The "color" field will now show a color picker interface... choose a color
7) If you want to have an icon on the TOC "tag", add a field named "icon" and enter the name of an image tiddler (e.g., $:/core/images/spiral)
8) Press "done".
The tiddler you created should now appear in the Sidebar TOC tab, with the color and icon you have chosen.
Repeat steps (2) through (8) to create more entries in the TOC.
enjoy,
-e