Go with a light background color if you have text that has a dark color. From the dropdown, choose a color as per your preference, and click on it. Then, click on the “Fill Color” option from the toolbar. To add background color to a text box in Google Slides, first, select the text box. In Google Slides, you can add background color in a text box to make the text look more aesthetically pleasing. How to Add Background Color to a Text Box in Google Slides?
By clicking on the “Border dash” icon, you can access a dropdown menu containing various border styles. The “Border dash” icon is next to the “Border weight” icon.