Assuming that you mean workbooks in a folder, not worksheets in a file as
your subject line says, then that's a Windows question, not an Excel
question, but by default (in some versions of Windows, at least) compressed
files are shown in blue.
--
David Biddulph

"mrcsmum" wrote in message
...
Within a folder, with several worksheets, some of them are listed in blue
ink
and some in black, why its this?????