Creating a custom theme in drupal is nearly a simple thing if you are good at css styling. Let us take a walk through the structure of theme implementation in drupal.
Custom Theme
Many Drupal users have implemented custom Colorbox themes. Sometimes these custom themes do not work smoothly with Colorbox as a few Drupal users found out that the Colorbox close button dosen't work with their custom theme. If you are facing the same scenario with a custom Colorbox theme in your Drupal site then read onto find out the solution.