Layouts and settings of demo site export file
To download a zip file containing Layouts and Settings of Lucky 7 demo site, click here.
To import these, go to My Theme -> Settings -> Import / Export and proceed.
How to change the colors of modules
Edit your site layout(s), edit the module(s) you would like to change the color of and choose your desired color from Style dropdown.
Screenshots below show this being applied for image module:
How to edit/add custom module styles in Lucky 7
Edit theme's lib/classes.php file.
For a detailed example, refer to this entry.