source engine Color class

class Color
{
public:
    Color ()
        :   R ( 0 ),
            G ( 0 ),
            B ( 0 ),
            A ( 0 )
    {

    }

    Color ( int r, int g, int b, int a )
        :   R ( r ),
            G ( g ),
            B ( b ),
            A ( a )
    {

    }

    Color ( int r, int g, int b )
        :   R ( r ),
            G ( g ),
            B ( b ),
            A ( 255 )
    {

    }

    static Color White ( void ) { return Color ( 255, 255, 255, 255 ); }
    static Color Black ( void ) { return Color ( 0, 0, 0, 255 ); }
    static Color Red ( void ) { return Color ( 255, 0, 0, 255 ); }
    static Color Green ( void ) { return Color ( 0, 255, 0, 255 ); }
    static Color Blue ( void ) { return Color ( 0, 0, 255, 255 ); }
    static Color Cyan ( void ) { return Color ( 0, 127, 255, 255 ); }
    static Color Yellow ( void ) { return Color ( 255, 255, 0, 255 ); }

    int r ( void ) { return R; }
    int g ( void ) { return G; }
    int b ( void ) { return B; }
    int a ( void ) { return A; }

    Color& operator = ( Color& c )
    {
        R = c.r ();
        G = c.g ();
        B = c.b ();
        A = c.a ();
        return *this;
    }

private:
    int R, G, B, A;
};