uh.... except the brown is co-dominant, more like, Pp/Pp if that makes any sense...
the way I intended to write it would be:
o+/o+ = white
o+/o+, Pp1 = light brown
o+/o+, Pp2 = slightly darker brown
o+/o+, Pp7 = medium brown
o+/o+, Pp13 = marans dark brown
O/O = Blue
O/O, Pp1 = light blue-green
O/O, Pp2 = slightly darker blue-green
O/O, Pp7 = medium blue-green
O/O, Pp13 = Olive egger
O/o+ = blue, or lighter blue
O/o+, Pp1 = light green
O/o+, Pp2 = slightly darker green
O/o+, Pp7 = medium green
O/o+, Pp13 = Olive egger
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the brown color works differently from the blue and white it works with them instead of completely canceling them out.
I know that each gene isn't contributing the exact same amount of pigment, but breeding can result in lighter or darker eggs based on what the parent stock has. So my brown numbers are more just a way to say how much brown pigment has been expressed.