diff --git a/src/Color.php b/src/Color.php
index 8f92069..13e5b3e 100644
--- a/src/Color.php
+++ b/src/Color.php
@@ -12,8 +12,9 @@ public static function toLinear(int $value): float {
 
     public static function tosRGB(float $value): int {
         $normalized = max(0, min(1, $value));
-        return ($normalized <= 0.0031308)
+        $result = ($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);
+        return max(0, min($result, 255));
     }
 }
\ No newline at end of file
diff --git a/test/DCTest.php b/test/DCTest.php
index 850cbf9..55d9faf 100644
--- a/test/DCTest.php
+++ b/test/DCTest.php
@@ -8,7 +8,7 @@ class DCTest extends TestCase {
 
     public function testEncode () {
         $this->assertSame (65793, DC::encode ([0, 0, 0], 1));
-        $this->assertSame (16843008, DC::encode ([255, 255, 255], 1));
+        $this->assertSame (16777215, DC::encode ([255, 255, 255], 1));
         $this->assertSame (65793, DC::encode ([-1, -1, -1], 1));
     }