count the cell that are in colour background (which set by conditional formating)

Hi, i am new here and i need your help!

I have been assigned a task to create one table by counting how many cells are in red, yellow, blue, white colour.

red: indicate the certificate which will expired within one month

Yellow: indicate certificate which will expired within 2 to 3 month

blue: indicate certificate which expired

white (without any colour): indicate certificate that will expired in the future which more than 3 month

The table shall consist of "non-expired cert" - red and yellow; expired cert and total cert.

It would be great if you can guide me, Thanks

Attached the file for further understanding