CMYK colour using Drawing Tools

Question

I'd like to use the Drawing Tools palette to draw objects in CMYK colour. The only way I seem able to change the colours of these objects is to use the window shown below.

Edit

Is there a way to change the colours of objects made with Drawing Tools that will allow me to enter the C, M, Y, K values into input fields?

Answer 1

Since as far as I can tell the Drawing Tools palette always uses the system (e.g. Windows) color picker I don't think it is (presently) possible to solve your first question.

Your second question has more possibility:

Is there a way to change the colours of objects made with Drawing Tools that will allow me to enter the C, M, Y, K values into input fields?

I believe that the functionality on which I shall depend was introduced in version 10.

Let's start with first example from the Graphics documentation:

gr = Graphics[{Thick, Green, Rectangle[{0, -1}, {2, 1}], Red, Disk[], Blue, 
   Circle[{2, 0}], Yellow, Polygon[{{2, 0}, {4, 1}, {4, -1}}], Purple, Arrowheads[Large], 
   Arrow[{{4, 3/2}, {0, 3/2}, {0, 0}}], Black, Dashed, Line[{{-1, 0}, {4, 0}}]}]

Although entered with directives here such a graphic could be constructed using the Drawing Tools.

We can convert this into an editable form by applying Defer to the head using Operate, and we can convert all color directives to CMYKColor type:

Operate[Defer, gr /. c_?ColorQ :> ToColor[c, CMYKColor]]

If we click on any of the color squares we get a CMYK setter like this:

After changing the color and clicking OK we can evaluate the cell to render the new Graphics: