See

http://www.mcgimpsey.com/excel/conditional6.html

for a way to get up to 6 font colors that depend on the cell value.
Otherwise you'll have to use a macro.

In article ,
"PAT ARTHUR" <PAT wrote:

Can Excel relate colour to value in a cell eg if 0.1=red, if 0.2-0.5= orange
& 0.6-1.0 = green?
If so, is it also possible that colours could be related on a sliding
numerical scale starting at say dark green at 1.0 and finishing at dark red
at 0.0 with brown in the middle (0.5) of the range?