I read your request a little differently than I think Ashish Mathur has.
As I understand it, you want the cells that others need to enter data in to remain unhighlighted until something indicates it is time for those others to make entries into those cells? If I've interpreted this properly, then read on...
First identify a cell that we will use as the indicator cell - when something is entered into it, it means that it time for the "others" to provide input into what will become highlighted cells. For the example I will pick cell A1 as that indicator cell.
And I will assume that you want to highlight cells C3:E7 when it is time for them to be filled in by others.
Select the cells C3:E7 and go to Home > Styles > Condition formatting > New Rule > Use a formula to determine which cells to format
In the formula box, enter =AND($A$1<>"",C3="")
Apply the cell shading as desired and click [OK] to finish up. As Ashish Mathur indicated you can even copy/paste special the format to other cells.
After that, the cells C3:E7 will remain unshaded until you make an entry into A1 and will remain shaded until someone makes an entry into them at which time they will become unhighlighted.