Hi, I'm looking to apply more than one colour format to the same cell, split
diagonally from right to left (one colour being orange, the other being
white/uncoloured). I don't want stripes, just two blocks of colour making up
the cell background.

Slightly bizarre question, I know, but it's for a work diary for a
department with colour representing 'busy' and white/uncoloured representing
'available'. As I'm busy for the first half of the day, I want to split the
cell in half. At the moment I just have a diagonal line and the whole cell in
orange, but wanted to make the 'pm' half of the cell to be clear. If that
makes sense!

Thanks for your help!

Gareth