How can I assign colors to calendar groups?

Question

Trying to set up calendar in Mavericks 10.9.3.  The defaults are Blue = Home, Green = Work, Purple = Holidays  and
Grey = Birthdays.. until you uncheck some and they disappear.  I like that they've added Holidays-- saves us all from looking them
all up and adding them ourselves..      But when adding my own groups,  I'd like them in different colors
to make them stand out. However, they're all showing up as grey.  I can't seem to find anywhere where I can set up my own colors.  
I wish Apple weren't getting so controlling. I know many of you want everything to synch up but........not everyone uses the
calendar for work or even wants to sync it with anything else.  Oh no!! 
The Calendar app used to be simple and easy and you could set it up however you wanted. Thank you! I'm capable of doing that.
Doesn't appear so now and very group the same grey color, isn't very helpful!  I'd get rid of "Home" too but it's the only thing that
isn't grey besides Holidays-- since I eliminated "Work".   I don't know what "Home" is.  Since "Holiday" is purple, I want "Medical Appts."
in Red.  I want other things in other colors.  Can this be done?   If so, how?     If not, Apple, please give it back to us!
Thank you.

Answer 1

OK...since writing the original post, I discovered that if I selected "New Calendar" from FILE drop down,
I could add all the groups I wanted. However,  each one is a new calendar. Each one is assigned a color
by Apple when the item shows up on my list with the blank box for me to name it.
I'd already entered numerous events so I went back to each one by simply double clicking on it on the
monthly calendar page that I had open, and the "info" window for that event opened. Then in the upper
right corner is a colored square where you can select the "calendar" you want that item on. Using ex.
mentioned in my first post, my Medical Appts. are now Orange (yuk!).  You scroll down your list to select the
one you want and the event goes to that "calendar"-- or color.
Now... the problem I have with that is you only get a COLORED DOT next to the event. IT ISN'T HIGHLIGHTED. 
The only things apparently that can be highlighted are under  the "View" drop down:  
"Show All Day Events",  "Show Declined Events" and "Show travel time". None of which I'll use except maybe
all day events. If you click it to show, a check mark appears next to it and the event becomes highlighted.
If you click a checked one it un-checks it, and it disappears completely from your calendar page. 
Apple, please let us HIGHLIGHT in whatever colors we want. Or... give us the option for each new calendar
whether we want to "highlight" or simply add the colored dot. That works really well, especially for those of us
who use our calendar also as a kind of  journal.
If people want to sync them with other devices, then let them set the calendar on their various devices up the same -
same group names or same calendar names assigned to the same colors and...  highlight or dot.
Then when they sync them,  should sync the same.  It's a win- win. Everyone gets what they want that way...