Step 1:
Navigate to WordPress Admin Dashboard > Appearance > Customizer > Hostiko Customizer > Cart Icon > Background Color.
Step 2:
To change the color search for Color.
Step 3:
To change the Border color search for Border Color.
Step 4:
To change the Border Radius search for Border Radius.
Step 5:
To change the Cart Hover background search for Background Hover Color.
Step 6:
To change the Cart Hover Color search for Hover Color.
Step 7:
Click on Publish once you are done with all of changes.