diff --git a/tests/Colors/Cmyk/ChannelTest.php b/tests/Colors/Cmyk/ChannelTest.php
new file mode 100644
index 00000000..44928abf
--- /dev/null
+++ b/tests/Colors/Cmyk/ChannelTest.php
@@ -0,0 +1,48 @@
+<?php
+
+namespace Intervention\Image\Tests\Colors\Cmyk;
+
+use Intervention\Image\Colors\Cmyk\Channels\Cyan as Channel;
+use Intervention\Image\Exceptions\ColorException;
+use Intervention\Image\Tests\TestCase;
+
+/**
+ * @requires extension gd
+ * @covers \Intervention\Image\Colors\Cmyk\Channels\Cyan
+ * @covers \Intervention\Image\Colors\Cmyk\Channels\Magenta
+ * @covers \Intervention\Image\Colors\Cmyk\Channels\Yellow
+ * @covers \Intervention\Image\Colors\Cmyk\Channels\Key
+ */
+class ChannelTest extends TestCase
+{
+    public function testConstructor(): void
+    {
+        $channel = new Channel(0);
+        $this->assertInstanceOf(Channel::class, $channel);
+    }
+
+    public function testValue(): void
+    {
+        $channel = new Channel(10);
+        $this->assertEquals(10, $channel->value());
+    }
+
+    public function testNormalize(): void
+    {
+        $channel = new Channel(100);
+        $this->assertEquals(1, $channel->normalize());
+        $channel = new Channel(0);
+        $this->assertEquals(0, $channel->normalize());
+        $channel = new Channel(20);
+        $this->assertEquals(.2, $channel->normalize());
+    }
+
+    public function testValidate(): void
+    {
+        $this->expectException(ColorException::class);
+        new Channel(101);
+
+        $this->expectException(ColorException::class);
+        new Channel(-1);
+    }
+}
diff --git a/tests/Colors/Rgb/ChannelTest.php b/tests/Colors/Rgb/ChannelTest.php
new file mode 100644
index 00000000..4cc2fadb
--- /dev/null
+++ b/tests/Colors/Rgb/ChannelTest.php
@@ -0,0 +1,47 @@
+<?php
+
+namespace Intervention\Image\Tests\Colors\Rgb;
+
+use Intervention\Image\Colors\Rgb\Channels\Red as Channel;
+use Intervention\Image\Exceptions\ColorException;
+use Intervention\Image\Tests\TestCase;
+
+/**
+ * @requires extension gd
+ * @covers \Intervention\Image\Colors\Rgb\Channels\Red
+ * @covers \Intervention\Image\Colors\Rgb\Channels\Green
+ * @covers \Intervention\Image\Colors\Rgb\Channels\Blue
+ */
+class ChannelTest extends TestCase
+{
+    public function testConstructor(): void
+    {
+        $channel = new Channel(0);
+        $this->assertInstanceOf(Channel::class, $channel);
+    }
+
+    public function testValue(): void
+    {
+        $channel = new Channel(10);
+        $this->assertEquals(10, $channel->value());
+    }
+
+    public function testNormalize(): void
+    {
+        $channel = new Channel(255);
+        $this->assertEquals(1, $channel->normalize());
+        $channel = new Channel(0);
+        $this->assertEquals(0, $channel->normalize());
+        $channel = new Channel(51);
+        $this->assertEquals(.2, $channel->normalize());
+    }
+
+    public function testValidate(): void
+    {
+        $this->expectException(ColorException::class);
+        new Channel(256);
+
+        $this->expectException(ColorException::class);
+        new Channel(-1);
+    }
+}
diff --git a/tests/Colors/Rgba/ChannelTest.php b/tests/Colors/Rgba/ChannelTest.php
new file mode 100644
index 00000000..a1144e40
--- /dev/null
+++ b/tests/Colors/Rgba/ChannelTest.php
@@ -0,0 +1,48 @@
+<?php
+
+namespace Intervention\Image\Tests\Colors\Rgba;
+
+use Intervention\Image\Colors\Rgba\Channels\Red as Channel;
+use Intervention\Image\Exceptions\ColorException;
+use Intervention\Image\Tests\TestCase;
+
+/**
+ * @requires extension gd
+ * @covers \Intervention\Image\Colors\Rgba\Channels\Red
+ * @covers \Intervention\Image\Colors\Rgba\Channels\Green
+ * @covers \Intervention\Image\Colors\Rgba\Channels\Blue
+ * @covers \Intervention\Image\Colors\Rgba\Channels\Alpha
+ */
+class ChannelTest extends TestCase
+{
+    public function testConstructor(): void
+    {
+        $channel = new Channel(0);
+        $this->assertInstanceOf(Channel::class, $channel);
+    }
+
+    public function testValue(): void
+    {
+        $channel = new Channel(10);
+        $this->assertEquals(10, $channel->value());
+    }
+
+    public function testNormalize(): void
+    {
+        $channel = new Channel(255);
+        $this->assertEquals(1, $channel->normalize());
+        $channel = new Channel(0);
+        $this->assertEquals(0, $channel->normalize());
+        $channel = new Channel(51);
+        $this->assertEquals(.2, $channel->normalize());
+    }
+
+    public function testValidate(): void
+    {
+        $this->expectException(ColorException::class);
+        new Channel(256);
+
+        $this->expectException(ColorException::class);
+        new Channel(-1);
+    }
+}