DSD - DSD quality
HR - quality better than 16/44.1 FLAC
SQ - cd-quality / 16/44.1 FLAC
[Chosen Icon] - quality less than 16/44.1 FLAC

The chosen quality icon will persist unless you have a higher quality file. You can set the quality icon as DSD/HR/SQ if you really want to.

By default, NOQUAL is the custom quality icon for quality less than 16/44.1 FLAC. To use the icon you want, simply rename it as "AKEY32_(182,284)" and import it alongside the main files.

If you want to change the color, go to paint then re-color them to how you want it.