The only way to change the color of the Info Slide is to edit the CSS that controls it. If you inspect it with
Firebug, you should be able to find the specific CSS that controls the color.
As far as the shortcodes, [siteurl] and [demourl] will give the same result on any site that is not the demo - the URL of the site. The "{demourl}" version of the shortcode is because you can't use a normal shortcode within another shortcode, so I made an adjustment that allows it to process the "{}" characters as if they were the "[]" characters, when used inside the settings of an existing shortcode. Hopefully that explanation makes sense.