Dear Morten,
Say for instance that you wanted the values in your spreadsheet colored four different colors,, red = <0, blue = >0 and <20, green = >20 and <40, black = >40 and <60 etc,
then you can only achieve this in excel by writing a code using "select case" as described by ardilesd. The above is not possible using the excel interface, at least not in excel 2000 anyway.