Stephen could you please let me know what's the source for this picture? Is it one of the encyclopedias or source books? Personally I think it looks really strange in a few places and not at all like the actual robes you see in the movie. For example the gloves in the movie are clearly of a reddish colour (burgundy, dark crimson, something along that line) while the gloves in that picture are a light brownish colour. Also the shoulder looks kind of strange if you ask me, like one of these 80s-style blazers my mum used to wear. But that might just be due to the fact that it seems to be worn by a rather skinny, petite person in this particular picture.
[...]For the boots when looking at the right guards left foot, I think agree they are red. It gets pretty pixelated, but they definitely are brighter than you would expect from a black boot. As to material, I can't tell that.[...]
I don't think that's really a foot/boot, but rather a funky reflection of the robe itself on the top of the bottommost stair to the bacta chamber. If it was a boot it would be rather long and kind of funny-looking
But as many have pointed out, there's no real use arguing yet, not before the Blurays have been released.