Jacobo Zanella makes a color palette every day, based on the clothes he's wearing.
I observe the colors of the shoes and clothes I wear that day, how much skin is exposed, etc., and reproduce that observation digitally, through RGB combinations. No software or programming is involved in the making of the graphs.
String them all together, and you've got multi-colors on top (shirts), a lot of black and blue towards the bottom (pants), and whites and grays all the way on the bottom (shoes).
Too bad he's not logging it programmatically. That could be an interesting view (well, for him).