A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
I have encountered the same problem with a spreadsheet I exported from TOAD. A macro I had written for another department and that has been working for years suddenly failed to apply fill colors as a part of conditional formatting. And not only the macro failed: I couldn't even apply fill colors manually using the functions on the ribbon.
Copying all the spreadsheet contents and pasting them into a brand new worksheet in a brand new workbook worked but that's a little kludgy.
Eventually I discovered that if I selected all cells and then applied "No Fill" from the ribbon, I could suddenly fill cells with color. A similar fix works for borders that won't appear: select all cells and then choose "No Borders". Don't know about text color. It has not failed.
Anyhow, try marking all cells with "No Fill" and "No Borders" and then retry your conditional formatting. It works for me so I just added that to my macro before I add the conditional formatting.
