It seems FME supports reading Sketchup and colors - through attributes like RenderingOptions.GroundColorRGB . However it does not seem to write these attributes if you have an fme_color on an object. I have tried creating an RenderingOptions.GroundColorRGB = 0.59999999999999998,0.74117647058823533,0.56470588235294117 - however it does not seem to work.
How do you set colors properly in FME for them to be displayed within Sketchup correctly?