2. Select the cell or text that needs shading.

3. Locate and click the Format or Style option.

4. In the drop-down menu, select "Shading" or "Pattern" option.

5. In the pop-up color selector, find the "color" option.

6. In the color selector, select a color with a green tone.

7. In the color panel, adjust the proportion of the green tone until it reaches 30%.

8. Confirm the settings and save them.