Function normalizeHexColor

src/shared/utils/color.ts:20–37

(color: string)

// ─── Normalize ───────────────────────────────────────────────────────────────

export function normalizeHexColor(color: string): string {
  if (typeof color !== "string") {
    return "";
  }

  const trimmed = color.trim().toLowerCase();
  if (SIX_DIGIT_HEX.test(trimmed)) {
    return trimmed;
  }

  const shortMatch = THREE_DIGIT_HEX.exec(trimmed);
  if (!shortMatch) {
    return "";
  }

  const [, value] = shortMatch;
  return `#${value[0]}${value[0]}${value[1]}${value[1]}${value[2]}${value[2]}`;
}

export function toUniqueHexColors(colors: string[] = []): string[] {
  const unique: string[] = [];