NC/CC Lock Screen indicators' colors reversed?

[cleo1]

Notice how in the screenshot, the top of the screen is blue and the bottom is violet, but the colors of the two pill-shaped swipe indicators are reversed—the top is violet and the bottom is blue, as if the background behind each indicator's counterpart were being sampled. What is going on here?

 

[Soundflunky]

CC is white glass. NC is black glass. The indicators are samples of the features they indicate.

 

[C DM]

It's likely simply like that for better visibility against the background color that is behind those pull tab indicators.