open-props/src/props.indigo.css

<div align="center">

:where(html) {
  --indigo-0: #edf2ff;
  --indigo-1: #dbe4ff;
  --indigo-2: #bac8ff;
  --indigo-3: #91a7ff;
  --indigo-4: #748ffc;
  --indigo-5: #5c7cfa;
  --indigo-6: #4c6ef5;
  --indigo-7: #4263eb;
  --indigo-8: #3b5bdb;
  --indigo-9: #364fc7;
  --indigo-10: #2f44ad;
  --indigo-11: #283a94;
  --indigo-12: #21307a;
}