Color Coded Calendar Report Formula

I have the calendar report with a color coded formula so that if the field "Salesperson" is the user it is one color, and if not user it is a different color. 
Case([Salesperson], User(), "#F0cd95", "#eddd85")

I'd like to add a third option/color, if the Salesperson is "Not the User but Not Blank".  This seems like it should be simple, however I'm drawing a complete blank about how to write this.

So, I'd like:
User = Color 1
Not User = Color 2
Blank = Color 3

Any help would be appreciated.
Thanks


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Brianne Jacobsen
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