I've tried creating an excel file for you and below is the link. Kindly download the file and see if it works as what you need:
https://drive.google.com/file/d/1JtQ_Ky84VyIEv9...
What I did was:
- Under Conditional formatting, i clicked on the new rule then,
- click on the "Use a formula to determine which cells to format"
- Under the "Format values where this formula is true:" I use this formula:
=$A2<=TIME(6,0,0)
**I converted the value of the cell in a2 to time, since it is read by excel as numbers under conditional formatting.
- I clicked on Format, then on the Fill tab I chose the red color.
- Then click on Ok.
If you want to edit it and apply it to all other cells, you may click on the Conditional Formatting again, and look for Manage Rules, under "Applies to:" you may select in which cell you would wanted to apply it.
Hope this helps.
Thanks