How to write a conditional formatting formula in Google Docs?

Question

Google

Good day!
There is a Google spreadsheet with data.
On the first sheet, in column G, the percentage deviation of the actual weight from the system weight. On the second sheet, allowable deviations depending on the mass of the goods.
Actually the question is: how to write a formula that will calculate the percentage deviation and "fill" the cell with the required color (from green to red), depending on the actual mass of the goods and the deviation from this actual mass?