Hi vincentg,

Are you clicking the Apply button at the bottom of the list of themes. See screenshot below:

That should do the trick.

Also, try clearing the T3 Cache using the link at the top of the joomla admin site.

Tried that and it makes no difference.
Only if I allow the browser to select the color scheme will it remember it which means it's saving it in a cookie.
Go to the website with a different browser and we see the default color scheme.

This is not good.

I am thinking as worse case to overwrite the default scheme with Dark Shadow.

Can you provide access details to your site so I can assist further?
You can mail the url and login info to info @ themerepublic.com and I could help with troubleshooting this.

Problem fixed: You seemed to be editing the default profile (the one thats shown in blue at the top) but had another profile (seance) assigned to all pages. See screenshot below: