Excel cell color based formating

Question

I am not sure if this is even possible. I have the worksheet (sheet1) as shown below. Green - Indicates user should have access Red - Indicates user should not have access

Based on the color coding for Member A, Member B in row 1 & 2. When Member A or B is selected in A4 to A100, the cells ("Field 1", "Field 2"....) should be enabled disabled based on the color coding. Please let me know if this is possible.

Answer 1

I did conditional formatting for the above and it works for me. Although it does not make the cell read-only. I have put some fill-in the cell, that makes it impossible to see whatever the user types!! :)