Locate the block with styles for radio buttons (it’s commented out as /* Radio buttons */) and replace each occurrence of “radio” with “checkbox”. Default: One Two One Two Custom checkbox: One Two Three Four ... /* When the radio button is checked, add a blue background */.container input:checked ~ .checkmark { background-color: #2196F3;} We’ve got lots of control over radios and checkboxes now. Yes, you can do it easily if you seeing this post. Each radio button and/or checkbox input element should be surrounded with