diff --git a/tests/unit/Transformer/HueSaturationValueTransformerTest.php b/tests/unit/Transformer/HueSaturationValueTransformerTest.php
new file mode 100644
index 0000000..0c5a7b8
--- /dev/null
+++ b/tests/unit/Transformer/HueSaturationValueTransformerTest.php
@@ -0,0 +1,105 @@
+<?php /** @noinspection PhpArrayShapeAttributeCanBeAddedInspection */
+
+namespace TorstenHettstedtUnitTests\Colors\Transformer;
+
+use Codeception\Test\Unit;
+use Exception;
+use TorstenHettstedt\Colors\ColorModels\HueSaturationValue;
+use TorstenHettstedt\Colors\Transformer\HueSaturationValueTransformer;
+
+class HueSaturationValueTransformerTest extends Unit
+{
+
+    const FLOAT_DELTA = 0.001;
+
+    protected HueSaturationValue $color;
+
+    /**
+     * @return float[][][]
+     */
+    public function validCmykValuesProvider(): array
+    {
+        return (new ValidColorValuesProvider())->getValidColorValues([
+            ValidColorValuesProvider::HSV,
+            ValidColorValuesProvider::CMYK,
+        ]);
+    }
+
+    /**
+     * @return float[][][]
+     */
+    public function validRgbValuesProvider(): array
+    {
+        return (new ValidColorValuesProvider())->getValidColorValues([
+            ValidColorValuesProvider::HSV,
+            ValidColorValuesProvider::RGB,
+        ]);
+    }
+
+    /**
+     * @param array $hsv
+     * @param array $rgb
+     *
+     * @dataProvider validRgbValuesProvider
+     *
+     * @throws Exception
+     */
+    public function testToRedGreenBlue(array $hsv, array $rgb)
+    {
+        $this->color = $this->make(HueSaturationValue::class, $hsv);
+
+        $transformer = new HueSaturationValueTransformer($this->color);
+
+        $color = $transformer->toRedGreenBlue();
+
+        $this->assertEqualsWithDelta($rgb['red'], $color->getRed(), self::FLOAT_DELTA);
+        $this->assertEqualsWithDelta($rgb['green'], $color->getGreen(), self::FLOAT_DELTA);
+        $this->assertEqualsWithDelta($rgb['blue'], $color->getBlue(), self::FLOAT_DELTA);
+
+    }
+
+    /**
+     * @param array $hsv
+     * @param array $cmyk
+     *
+     * @throws Exception
+     * @dataProvider validCmykValuesProvider
+     *
+     */
+    public function testToCyanMagentaYellowKey(array $hsv, array $cmyk)
+    {
+
+        $this->color = $this->make(HueSaturationValue::class, $hsv);
+
+        $transformer = new HueSaturationValueTransformer($this->color);
+
+        $color = $transformer->toCyanMagentaYellowKey();
+
+        $this->assertEqualsWithDelta($cmyk['cyan'], $color->getCyan(), self::FLOAT_DELTA);
+        $this->assertEqualsWithDelta($cmyk['magenta'], $color->getMagenta(), self::FLOAT_DELTA);
+        $this->assertEqualsWithDelta($cmyk['yellow'], $color->getYellow(), self::FLOAT_DELTA);
+        $this->assertEqualsWithDelta($cmyk['key'], $color->getKey(), self::FLOAT_DELTA);
+    }
+
+    /**
+     * @param array $hsv
+     * @param array $cmyk
+     *
+     * @throws Exception
+     *
+     * @dataProvider validCmykValuesProvider
+     *
+     */
+    public function testToHueSaturationValue(array $hsv, array $cmyk)
+    {
+        $this->color = $this->make(HueSaturationValue::class, $hsv);
+
+        $transformer = new HueSaturationValueTransformer($this->color);
+
+        $color = $transformer->toHueSaturationValue();
+
+        $this->assertEqualsWithDelta($hsv['hue'], $color->getHue(), self::FLOAT_DELTA);
+        $this->assertEqualsWithDelta($hsv['saturation'], $color->getSaturation(), self::FLOAT_DELTA);
+        $this->assertEqualsWithDelta($hsv['value'], $color->getValue(), self::FLOAT_DELTA);
+    }
+}
diff --git a/tests/unit/Transformer/RedGreenBlueTransformerTest.php b/tests/unit/Transformer/RedGreenBlueTransformerTest.php
new file mode 100644
index 0000000..67e2adf
--- /dev/null
+++ b/tests/unit/Transformer/RedGreenBlueTransformerTest.php
@@ -0,0 +1,102 @@
+<?php /** @noinspection PhpArrayShapeAttributeCanBeAddedInspection */
+
+namespace TorstenHettstedtUnitTests\Colors\Transformer;
+
+use Codeception\Test\Unit;
+use Exception;
+use TorstenHettstedt\Colors\ColorModels\RedGreenBlue;
+use TorstenHettstedt\Colors\Transformer\RedGreenBlueTransformer;
+
+class RedGreenBlueTransformerTest extends Unit
+{
+
+    const FLOAT_DELTA = 0.001;
+
+    protected RedGreenBlue $color;
+
+    /**
+     * @return float[][][]
+     */
+    public function validCmykValuesProvider(): array
+    {
+        return (new ValidColorValuesProvider())->getValidColorValues([
+            ValidColorValuesProvider::RGB,
+            ValidColorValuesProvider::CMYK,
+        ]);
+    }
+
+    /**
+     * @return float[][][]
+     */
+    public function validHsvValuesProvider(): array
+    {
+        return (new ValidColorValuesProvider())->getValidColorValues([
+            ValidColorValuesProvider::RGB,
+            ValidColorValuesProvider::HSV,
+        ]);
+    }
+
+    /**
+     * @param array $rgb
+     *
+     * @dataProvider validCmykValuesProvider
+     *
+     * @throws Exception
+     */
+    public function testToRedGreenBlue(array $rgb)
+    {
+        $this->color = $this->make(RedGreenBlue::class, $rgb);
+
+        $transformer = new RedGreenBlueTransformer($this->color);
+
+        $color = $transformer->toRedGreenBlue();
+
+        $this->assertEqualsWithDelta($rgb['red'], $color->getRed(), self::FLOAT_DELTA);
+        $this->assertEqualsWithDelta($rgb['green'], $color->getGreen(), self::FLOAT_DELTA);
+        $this->assertEqualsWithDelta($rgb['blue'], $color->getBlue(), self::FLOAT_DELTA);
+
+    }
+
+    /**
+     * @param array $rgb
+     * @param array $cmyk
+     *
+     * @throws Exception
+     * @dataProvider validCmykValuesProvider
+     *
+     */
+    public function testToCyanMagentaYellowKey(array $rgb, array $cmyk)
+    {
+
+        $this->color = $this->make(RedGreenBlue::class, $rgb);
+
+        $transformer = new RedGreenBlueTransformer($this->color);
+
+        $color = $transformer->toCyanMagentaYellowKey();
+
+        $this->assertEqualsWithDelta($cmyk['cyan'], $color->getCyan(), self::FLOAT_DELTA);
+        $this->assertEqualsWithDelta($cmyk['magenta'], $color->getMagenta(), self::FLOAT_DELTA);
+        $this->assertEqualsWithDelta($cmyk['yellow'], $color->getYellow(), self::FLOAT_DELTA);
+        $this->assertEqualsWithDelta($cmyk['key'], $color->getKey(), self::FLOAT_DELTA);
+    }
+
+    /**
+     * @param array $rgb
+     * @param array $hsv
+     *
+     * @throws Exception
+     * @dataProvider validHsvValuesProvider
+     */
+    public function testToHueSaturationValue(array $rgb, array $hsv)
+    {
+        $this->color = $this->make(RedGreenBlue::class, $rgb);
+
+        $transformer = new RedGreenBlueTransformer($this->color);
+
+        $color = $transformer->toHueSaturationValue();
+
+        $this->assertEqualsWithDelta($hsv['hue'], $color->getHue(), self::FLOAT_DELTA);
+        $this->assertEqualsWithDelta($hsv['saturation'], $color->getSaturation(), self::FLOAT_DELTA);
+        $this->assertEqualsWithDelta($hsv['value'], $color->getValue(), self::FLOAT_DELTA);
+    }
+}