You do it like this: Choose the cell you want the color chages to happen in. Go to conditional formating then choose formula is in the drop down box and write the formula like this.
=Cell with the reference = condition then choose the color you want it to be below is an example of one i did were i used letters but this could be replaced with numbers or > < =L5="MC"
the only problem is you are limited to 3 conditional formats to a cell im yet to work out how to add more.
The formula above will not format the row.
try Formula is_
=$a1="apple"
$a1 being the start cell that you want
so! if you selected a1:m100
and you needed the whole row changing based on the value in column A then that is how you do it.
if you need it based on column G then
=$G1="apple"
the $ part makes all cells on that row look at the absolute COLUMN but moves with the relative ROW.
TIP: make sure you select the area from Top Left to Bottom Right, then you can check in the name box as to which ROW/COLUMN to write into the formula.
Hope this makes sense, it's vague to me
Any probs let me know