GCal Column Colours is a Chrome add-on developed by Ben Meier. This free program allows you to personalize the background colors of the columns in your Google Calendar. With a simple installation process, you can easily customize your calendar to fit your preferences.

This version of GCal Column Colours introduces some basic customization options. It adds a light grey background to your weekends, making them visually distinct from the rest of the week. Additionally, it provides a colored indicator for the current day, making it easier to locate and differentiate from other dates.

Please note that this is version 0.1 of the add-on, so there may be some bugs or limitations. However, the developer has plans to release future versions that will offer more customization options and potentially support languages other than English.