Documentation: Added initial colour conv doc.

Doc/sphinx/scriptref/colourconverting.rst

@@ -3,5 +3,80 @@
 Colour Conversions
 ==================
 
-Please refer to http://wizzup.org/simbafpcdoc/colour_conv/index.html for now.
+Colour spaces
+-------------
+
+Explain some colour spaces here.
+
+
+Colour Conversion Methods
+-------------------------
+
+.. code-block:: pascal
+
+    procedure ColorToRGB(Color: integer; var r, g, b: Integer);
+
+RGBtoColor
+~~~~~~~~~~
+
+.. code-block:: pascal
+
+    function RGBtoColor(r, g, b: Integer): TColor;
+
+ColorToHSL
+~~~~~~~~~~
+
+.. code-block:: pascal
+
+    procedure ColorToHSL(Color: Integer; var h, s, l: Extended);
+
+HSLToColor
+~~~~~~~~~~
+
+.. code-block:: pascal
+
+    function HSLToColor(H, S, L: Extended): TColor;
+
+ColorToXYZ
+~~~~~~~~~~
+
+.. code-block:: pascal
+
+    procedure ColorToXYZ(Color: Integer; var x, y, z: Extended);
+
+XYZToColor
+~~~~~~~~~~
+
+.. code-block:: pascal
+
+    function XYZToColor(X, Y, Z: Extended): TColor;
+
+RGBToHSL
+~~~~~~~~
+
+.. code-block:: pascal
+
+    procedure RGBToHSL(R, G, B: Integer; var h, s, l: Extended);
+
+HSLtoRGB
+~~~~~~~~
+
+.. code-block:: pascal
+
+    procedure HSLtoRGB(H, S, L: extended; var R, G ,B: Integer);
+
+RGBToXYZ
+~~~~~~~~
+
+.. code-block:: pascal
+
+    procedure RGBToXYZ(R, G, B: Integer;var x, y ,z: Extended);
+
+XYZToRGB
+~~~~~~~~
+
+.. code-block:: pascal
+
+    procedure XYZToRGB(X, Y, Z: Extended; var R, G, B: Integer);
+