Another related question please, how do I appoint the color with a name and
location for easy access? Can I create several colors, a palette, for easy
access?
Since Office uses the system color dialog, you can save it in a palette
just like you can from any other application.
In the system color dialog (which you used to set your CMYK color), once
you have set you color, click the "Color Palettes" icon, choose "New"
from the right-hand dropdown (with the gear icon) to create a new
palette, then click the '+' button to add the color to the palette.
Your palette will now be available in any application (that uses the
system color dialog).