<?php namespace App\Util\Blurhash; final class Color { public static function toLinear(int $value): float { $value = $value / 255; return ($value <= 0.04045) ? $value / 12.92 : pow(($value + 0.055) / 1.055, 2.4); } public static function tosRGB(float $value): int { $normalized = max(0, min(1, $value)); return ($normalized <= 0.0031308) ? (int) round($normalized * 12.92 * 255 + 0.5) : (int) round((1.055 * pow($normalized, 1 / 2.4) - 0.055) * 255 + 0.5); } }