I noticed that there are colored bars on the left side of each unread story/item; they are two vertical blue bars. For some items the colors are more faded than others. What do these indicators signify?
The reason they are slightly different colors next to the same Twitter icon is because the algorithm, K-means clustering, used to pick out the dominant color in an image, is non-deterministic. Meaning that it will give slightly different results every time you run it against an icon, since it's randomly sampling tiny areas of the icon in order to figure out the dominant color.