To adjust the circle icon widget background and icon colors, navigate to Appearance > Customize > Theme Design > Widgets. Set the color by clicking on the “Select Color” button next to each setting respectively.
Select the desired color using the color pallet (1) or type in the color Hex (#) Value. Adjust the color intensity using the slider (2). Allow 5 seconds for the preview window to regenerate. When you are done click on the “Save & Publish” button.