Missing color

[SKHlandman]

I can color different columns and/or rows in Excel, and they will print;
however I cannot see them on my monitor. I have to print the sheet to see
what I've colored/highlighted.

 

[Debra Dalgleish]

If the high contrast setting is turned on you won't see the fill colour.
There's information in the following MSKB article:

OFF: Changes to Fill Colour and Fill Pattern Are Not Displayed
http://support.microsoft.com/?id=320531