Users often complain about the patchwork look of Outlook 2007/2010′s calendar. This is caused by setting All Day Events to Show time as Busy and setting a color category on the item.

Items marked with hash lines are Tentative.
Items marked Out-of-Office are always purple, with the block around the appointment text using the category color.
Timed appointments are shown in the category color and the Free/Busy tags are shown in a small bar to the left of the appointment.
Tentative has hash marksBusy uses the category color.
Free is white (Outlook 2007) or a lighter shade of the color category (Outlook 2010).
Out-of-Office is purple
Day and Week calendars are also shown in the category colors when All Day events are marked busy or purple when the event is marked Out-of-Office. (In this screenshot, the Tentative appointment has a blue background because it’s on the weekend, which is shaded blue.)
Appointment form showing the location of the Show time as command and All Day event box:
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Can someone please tell me if there is a way to set your free days as the color white in Outlook 2010, is this possible or is it set in stone that your free days will always show up as a lighter shade of the color category.
You can’t change the colors of items marked Free. Sorry.
The background color (any color) on 2010 Calender is very annoying and distracting. I like the category colors, but NOT the background colors. PLEASE provide a “no background color” option for 2010 Calendar.
It’s too late for Outlook 2010… probably too late for Outlook 15. :( i’m still not sold on the functionality of color categories over the un-colored categories in older versions.
Can someone tell me if there is a way to line up the category colors in the calendar. For instance, I use the calendar for setting up classes on a daily basis, i categorize them by color according to the class. Sometimes I have 4 to 5 classes in one day that run simultaneously and i would like for all the classes based on time to line up vertically according to color. It’s easy view instead of the colors being all scattered on the calendar.
No, unfortunately, that is not possible. They sort by subject and/or created date so its not impossible, but it’s not an easy task.
How can I assign colors using automatic formatting rules to an entire shared calendar? I need the color-coding to be visible to anybody within my organization who accesses the calendar rather than just in my own outlook 2010 display.
Correction to above: I’m using outlook 2007 but some other users of the calendar still have 2003. Thank you in advance!