For anyone that is not aware, in SU2017 some of the assigned colors in the Materials - Select - Colors tray do not match the thumbnail colors.
This is most present near the end of the listings of the colors where there is the magenta and gray-scale colors. Although it could be present everywhere.
To see what i mean just create a rectangle and then assign one of the gray-scale colors to the rectangle and then if you have a color picker tool like i have check to see if the color on the rectangle matches the color in the thumbnail. You will quickly see that they dont match.
Furthermore, the colors M00 (white) and M01 (less white) are the same color. Sometimes the color assigned to the objects in the scenes ends up being M00 and sometimes it ends up being M01.
I hope my voice is heard and the issue is addressed. It would be nice to have all the colors working correctly just in time for SU2018.