Is it possible, to have a "right mouse click" option and it bring up in the
menu various fill colors?

What I need to happen, is throughout a spread sheet certain cells are
changed often (only 1 of 3 colors) I understand that there is an option to
select from multiple colors on the toolbar, but some sort of short cut would
work better.

Or even a spiral or dropdown in the cell to select a colors. Thanks.