Use the Formula instead for your Conditional Formatting, see
http://www.mvps.org/dmcritchie/excel/condfmt.htm
You will need to set up 3 formula for each of the three colors
Depending on whether you only want B1 to change color,
or the entire column to be checked or the entire row to be
colored you will have to modify relative and absolute address.
If you mean specifically A1 then use $A$1 otherwise you
could use the following just to color cell B1, and thing in the
B column or any row based on the value in the B cell of that row.
The cell B1 must be the active cell when creating the C.F
(actually with $Bn any cell on row 1 could be the active cell).
Formula 1: =AND($B1*4=$A1, ISNUMBER($B1)) format as blue (pattern color)
Formula 2: =AND($B1*2=$A1,ISNUMBER($B1)) format as red
Formula 3: =AND($B1=(3/4*$A1),ISNUMBER($B1)) format as green
If you want more than 3 colors (+ default) you will have to use an Event macro
or use the Extended Conditional formatting addin see the reference above.
FWIW, use of ExcelForum makes searching of websites very difficult
for everyone because ExcelForum dumps newsgroup postings into webpages.