Yes, it's the differential in colors I have a hard time identifying. For me, I'm the ultra-rare, 100% color blind, so dim for disabled to a more light icon for enabled would be optimal. That's why I was thinking to just adopt the scheme for the logos already in place. I have no problem identifying the difference between the heart logo at the top and the one at the bottom, and I figured it would hopefully only be a minimal code change.
