Removing Colour Changer

I am using Xerte for a select group of students and none of them needs the colour changer button at the bottom of templates . Its an unnecessary distraction for me as well as my students . I would just like to know in layman terms , so as to how can I remove it ?

If you're really really sure that nobody will be disadvantaged by removing the button to access those accessibility features then you can remove the button with some jquery. But you should be 100% sure and check with your students before doing so.
Select the first icon in the tree
Add a script optional property
Add the following script: HTH
Ron