Selector pseudo-class :checked

The :checked CSS pseudo-class selector represents
any radio (), checkbox
(), or option ( in
a ) element that is checked or toggled to an on state. /* Labels for checked inputs */ input:checked + label { color: red; } /* Radio element, when checked */ input[type="radio"]:checked { box-shadow: 0 0 0 3px orange; } /* Checkbox element, when checked */ input[type="checkbox"]:checked { box-shadow: 0 0 0 3px hotpink; } /* Option elements, when selected */ option:checked { box-shadow: 0 0 0 3px lime; color: red; }