Configuring redCOOKIE
After installing redCOOKIE you must configure the plugin: Go to Extensions -> Plugin Manager
Once you are in the Joomla plugins list search for redcookie: And Click in the "system -redCOOKIE plugin" link, this will take you to the plugin configuration screen:
Modify the Colors of the Cookie Info box
The first parameters of the configuration allow you to modify the colours of the Background and the text of the redCOOKIE info box:
Modify the Text to be displayed in the Cookie Info box
The text fields need to be filled with the cookie law requirements that you will show in your website. See the following example: