Kontrollkästchen Hintergrundfarbe CSS
input[type="checkbox"] {
-webkit-appearance: none;
-moz-appearance: none;
appearance: none;
/* Styling checkbox */
width: 16px;
height: 16px;
background-color: green;
}
input[type="checkbox"]:checked {
background-color: blue;
}
<input type="checkbox" />
Chandan