Select Color Dialog Box from lisp

Hi,

using autolisp or visual lisp I want to open "Select Color Dialog Box" http://exchange.autodesk.com/autocadarchitecture/enu/online-help/browse#WS1a9193826455f5ffa23ce210c4a30acaf-4d02.htm and get RGB color code to my lisp.

If I enter "color" in command line, i get color dialog box, but if I use this command in (command "color") I get more promts and not color Dialog Box.

I want to make a lisp routine which would ask for first color, second color and range of colors. And will calculate color range from first color to second color.

Thanks.