Shading cells

[Color Blind]

I am having problems shading cells in excel.
When I try to shade a cell or cells using either option below the cell stays
white and nothing happens.

1st: I try the Fill in Color button image on the formatting tool bar.
(Nothing)

2nd:I try to going to the other way by right clicking on cell, choosing
format cell, then pattern, then select color. (nothing)

Any assistance would be great.

 

[zzqv9p]

you may want to check and see if you have conditional formatiing on the cell