Hex constant method starts from ".a": 0xCCCCCC.argb

[Виталий Фадеев]

We have:

     static import winapi=core.sys.windows.windows;

     struct Color
     {
         union
         {
              winapi.COLORREF native;
              struct
             {
                 ubyte r;
                 ubyte g;
                 ubyte b;
             }
         }
         ubyte a = 0xFF;
     }


     Color argb( uint color )
     {
         Color c;

         c.native =
             cast( uint ) (
                 ( ( color & 0x000000FF ) << 16 )  |
                 ( ( color & 0x0000FF00 ) )  |
                 ( ( color & 0x00FF0000 ) >> 16 )
             );

         c.a = ( color & 0xFF000000 ) >> 24;

         return c;
     }


Goal:
     auto color = 0x00AABBCC.argb;

Has error:
     Error: exponent required for hex float
     ( at 0x00AABBCC.argb )

What is it ?
How to implement beauty code like the: #CCCCCC.rgb ?