light blue highlighted text (color c2fff4)

Hi, Mike! It does go away when I turn off this preference, but there is no custom tracking applied in these paragraphs, and, in the parts where I indeed changed the tracking, the color is darker, like in the paragraphs in the bottom of the first picture.  

I'm aquainted with this composition feature and with the darker green, and I use it frequently. The thing is the lighter neon bluish green — because I'm unaware of what it is indicating, it makes me unsure of my work. 

I went through indesign user manual and some googling before coming here, but I couldn't find the answer for this behavior.

It was turned off. If I turn this option on, it shows the paragraph style overrides instead, yet another color 🙂 
I'm acquainted with this function, the weird thing for me is that there is a new color highlighting a paragraph with no overrides.

No, it doesn't desappear. But, I just noticed that it goes away when I turn off the tracking option — the problem is that this paragraphs have no custom tracking/kerning, no paragraph style override, no GREP style applied, no nested style, no character style. I tend to think this might have something to do with some of the fonts we are using that are installed, even though there is no message or any obvious error that I can notice.