For the record, Color ‘M00’ in the Materials - Colors section in a tray is incorrect in SU2017 and maybe even SU2016. The thumbnail shows the color white (RGB 255,255,255) but the actual assigned color is the same as ‘M01’.
How strange that the developers could make such a basic error.
And while i’m on the subject, in Styles - Edit - Modeling Settings, the color used for selected objects should not be blue by default since blue for the outlines of selected objects is just not very visible. The color cyan as the default would be a more logical choice since its very bright and visible and is neatly the opposite of the color red for locked items.