Function getScoreColor

frontend/lib/utils.ts:286–311

(score: number)

 * @returns Color hex string - default gray for scores < 90%, green gradient for scores >= 90%
 */
export function getScoreColor(score: number): string {
  if (typeof score !== 'number' || isNaN(score)) {
    return '#d9d9d9'; // Default gray
  }
  
  const percentage = score * 100;
  
  // Scores below 90% use default gray
  if (percentage < 90) {
    return '#d9d9d9';
  }
  
  // Scores 90% and above: gradient from light green to dark green
  // Map 90-100% to color range: #A8E6B2 (light green) to #39C651 (dark green)
  const normalized = (percentage - 90) / 10; // 0 to 1 for 90-100%
  
  // Interpolate between light green (#95de64) and dark green (#52c41a)
  const r1 = 0xa8, g1 = 0xe6, b1 = 0xb2; // Light green
  const r2 = 0x39, g2 = 0xc6, b2 = 0x51; // Dark green
  
  const r = Math.round(r1 + (r2 - r1) * normalized);
  const g = Math.round(g1 + (g2 - g1) * normalized);
  const b = Math.round(b1 + (b2 - b1) * normalized);
  
  return `#${r.toString(16).padStart(2, '0')}${g.toString(16).padStart(2, '0')}${b.toString(16).padStart(2, '0')}`;
}

// Password validation utilities
export interface PasswordChecks {