There are some ways, though it kind of 'breaks' the home screen
I don't think it "breaks" anything to display calendar data in the calendar color. There is a very good usability reason for having distinct colors (my wife and I have 10 calendars shared between us—color coding is crucial to usability).
I really like the mockup with the colors below—I was surprised that it didn't already behave this way. I would add to give users the option to have the WHOLE title (not the date) be colored according to calendar.
Says I already voted, but didn't. Anyway the other way to display the color is to change the Time section, for example in your pic above "In Minutes" would be calendar color. Same for when you go into Upcoming Appointments - can always make it an toggle option.
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