dark-styles.css

html,
body,
#oc-file-picker {
  background-color: #292929;
  height: 100%;
  --oc-color-text-default: #c2c2c2;
  --oc-color-swatch-passive-default: #007cac;
  --oc-color-swatch-primary-default: #007cac;
  --oc-color-swatch-brand-default: #007cac;
  --oc-color-text-muted: #c2c2c2;
  --oc-color-border: 202020;
}

.oc-button-passive-raw {
  font-weight: 700;
}

tr.oc-file-picker-row.oc-cursor-pointer:not(:last-child) {
  border-bottom: 1px solid black;
}

tr.oc-background-selected {
  background-color: #313438 !important;
}

tr.oc-file-picker-row.oc-cursor-pointer:hover {
  background-color: #2e2e2e;
}

.oc-checkbox.oc-checkbox-m {
  border-radius: 5px;
  height: 24px;
  width: 24px;
  border: 2px solid #4c5f79;
  background-color: #202020;
}

.oc-checkbox.oc-checkbox-m:checked {
  background-color: #fff;
  color: #202020;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg width='14' height='11' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath fill='var(--oc-color-input-border)' d='M12 1L5 7.5 2 5l-1 .5L5 10l8-8.5z'/%3E%3C/svg%3E");
  ;
}