diff --git a/tests/src/main.cpp b/tests/src/main.cpp
index 533ab2a..3ad669c 100644
--- a/tests/src/main.cpp
+++ b/tests/src/main.cpp
@@ -1,8 +1,91 @@
-#define BOOST_TEST_MODULE My Test
+#define BOOST_TEST_MODULE LibScreensaverTest
 #define BOOST_TEST_DYN_LINK
 #include <boost/test/unit_test.hpp>
+#include "../../src/Color.hpp"
 
-BOOST_AUTO_TEST_CASE(first_test)
-{
-    BOOST_TEST(1 == 1);
+BOOST_AUTO_TEST_CASE(hsb2rgb_red_test) {
+    HSB hsb;
+    hsb.h = 0.0; // red
+    hsb.s = 1.0;
+    hsb.b = 1.0;
+
+    Color col {hsb};
+    RGB rgb {RGB(col)};
+
+    BOOST_TEST(rgb.r == 1.0);
+    BOOST_TEST(rgb.g == 0.0);
+    BOOST_TEST(rgb.b == 0.0);
+}
+
+BOOST_AUTO_TEST_CASE(hsb2rgb_yellow_test) {
+    HSB hsb;
+    hsb.h = 60.0; // yellow
+    hsb.s = 1.0;
+    hsb.b = 1.0;
+
+    Color col {hsb};
+    RGB rgb {RGB(col)};
+
+    // yellow = red + green
+    BOOST_TEST(rgb.r == 1.0);
+    BOOST_TEST(rgb.g == 1.0);
+    BOOST_TEST(rgb.b == 0.0);
+}
+
+BOOST_AUTO_TEST_CASE(hsb2rgb_green_test) {
+    HSB hsb;
+    hsb.h = 120.0; // green
+    hsb.s = 1.0;
+    hsb.b = 1.0;
+
+    Color col {hsb};
+    RGB rgb {RGB(col)};
+
+    BOOST_TEST(rgb.r == 0.0);
+    BOOST_TEST(rgb.g == 1.0);
+    BOOST_TEST(rgb.b == 0.0);
+}
+
+BOOST_AUTO_TEST_CASE(hsb2rgb_cyan_test) {
+    HSB hsb;
+    hsb.h = 180.0; //
+    hsb.s = 1.0;
+    hsb.b = 1.0;
+
+    Color col {hsb};
+    RGB rgb {RGB(col)};
+
+    // cyan = green + blue
+    BOOST_TEST(rgb.r == 0.0);
+    BOOST_TEST(rgb.g == 1.0);
+    BOOST_TEST(rgb.b == 1.0);
+}
+
+BOOST_AUTO_TEST_CASE(hsb2rgb_blue_test) {
+    HSB hsb;
+    hsb.h = 240.0; // blue
+    hsb.s = 1.0;
+    hsb.b = 1.0;
+
+    Color col {hsb};
+    RGB rgb {RGB(col)};
+
+    BOOST_TEST(rgb.r == 0.0);
+    BOOST_TEST(rgb.g == 0.0);
+    BOOST_TEST(rgb.b == 1.0);
+}
+
+BOOST_AUTO_TEST_CASE(hsb2rgb_magenta_test) {
+    HSB hsb;
+    hsb.h = 300.0; // magenta
+    hsb.s = 1.0;
+    hsb.b = 1.0;
+
+    Color col {hsb};
+    RGB rgb {RGB(col)};
+
+    // magenta = red + blue
+    BOOST_TEST(rgb.r == 1.0);
+    BOOST_TEST(rgb.g == 0.0);
+    BOOST_TEST(rgb.b == 1.0);
 }