As described in my last message.
Regarding confusion: So far we have always applied the color or patterns to the area INSIDE the robot (within the outline). But it could be applied solely for the OUTLINE itself as well (making only the OUTLINE) show the pattern... So the robot inside is black for instance and the Outline itself is colored or shows the background pattern.......
For instance: You use the select by color tool, then you select the outline color and get the selection for the outline..... Then you use this selection to cut out or copy a part of your background. So you will get a new layer that has the outline shape but the color / texture of the background. Then you could invert the selection again and golor the robot in a color that looks good (or several colors) or you can just let it dark!
Hope I did not confuse you even more now ;-) All the best Chris