.custom-control.material-checkbox {
  --color: #26a69a;
}
.custom-control.material-checkbox .material-control-input {
  display: none;
}
.custom-control.material-checkbox .material-control-input:checked ~ .material-control-indicator {
  border-color: var(--color);
  transform: rotateZ(45deg) translate(1px, -5px);
  width: 10px;
  border-top: 0px solid #fff;
  border-left: 0px solid #fff;
}
.custom-control.material-checkbox .material-control-indicator {
  display: inline-block;
  position: absolute;
  top: 4px;
  left: 0;
  width: 16px;
  height: 16px;
  border: 2px solid #aaa;
  transition: 0.3s;
}