.modal-overlay {
  position: fixed;
  top: 0; right: 0; bottom: 0; left: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 100;
  display: none;
}

.modal-overlay {
  position: fixed;
  top: 0; right: 0; bottom: 0; left: 0;
  background: rgba(240, 240, 240, 0.7);
  z-index: 100;
  display: none;
}

Correct modal overlay colour per @jenskanis' design
Correct modal overlay colour per @jenskanis' design
