I don't know which autobiographical piece of art you are talking about,
but Generally an autobiography is about the writer himself. <span>It shows the pain and suffering experienced by the artist.
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Color scheme would mostly be Solid colors Im looking at some pictures from the show and I see lots of solid colors I don’t see many vivid or highlighted colors maybe it’s because solid colors and solid dark colors usually represent something that’s filled with some seriousness . But because they are teenagers with robots it seems they did add some hints of highlights to colors making them stand out also