Auto-generate a perceptually correct dark mode

Per-color mapping

:root[data-theme="dark"] {
  --surface-0: #0e0300;
  --surface-1: #170903;
  --surface-2: #211208;
  --surface-3: #2b1b11;
  --accent-1: #7c5ffa;
  --accent-2: #00d4ff;
  --accent-3: #ff7ad9;
  --accent-4: #2ce568;
  --accent-5: #ffd166;
  --text-primary: #f8f0ec;
  --text-muted: #ada29c;
}