Check my Metro Design Guideline presentation at https://skydrive.live.com/view.aspx?resid=40CFFDE85F1AB56A!1284 slide 55
The colors are:
PURPLE
RGB 162 0 255
A200FF
MAGENTA
RGB 255 0 151
FF0097
TEAL
RGB 0 171 169
00ABA9
LIME
RGB 140 191 38
8CBF26
BROWN
RGB 160 80 0
A05000
PINK
RGB 230 113 184
E671B8
ORANGE
RGB 240 150 9
F09609
BLUE
RGB 27 161 226
1BA1E2
RED
RGB 229 20 0
E51400
GREEN
RGB 51 153 51
339933