message: do not convert value to lowercase when looking up color
diff: @@ -10,7 +10,6 @@ const TIME_SHIFT_PATTERN = /\d+ \w+ offset/;
  export function cleanColorInput(value) {
  // for superset series that should have the same color
  return String(value).trim()
  - .toLowerCase()
  .split(', ')
  .filter(k => !TIME_SHIFT_PATTERN.test(k))
  .join(', ');
  