Step 1:
Navigate to WordPress Admin Dashboard > Appearance > Customizer > Hostiko Customizer > Live Chat > Apply Style.
Step 2:
Change the toggle button to Yes.
Step 3:
To change the Background color search for Background Color.
Step 4:
To change the color search for Color.
Step 5:
To change the border color search for Border Color.
Step 6:
To change the border radius search for Border Radius.
Step 7:
To change the Cart Hover background search for Background Hover Color.
Step 8:
To change the Cart Hover Color search for Hover Color.
Step 9:
Click on Publish once you are done with all of changes.