Unfortunately, the dev team has a bad habit of putting similar color shades on top of each other. A friend of mine struggled a lot with E10S due to her poor eyesight. She simply couldn't see the black triangle marker, on top of the black tether which was attached to the black boss. A shade of purple or red to break up that color stream would have helped immensely. Likewise, P3S suffers from red on top of orange with yellow tethers.