Green I wear this for my dad wristband
We know a wristband won't change cancer, but what they will do, is show our solidarity for those dealing with their fight, journey, battle, process, whatever you want to call it. Seeing a "Fuck Cancer" wristband in the color that represents what you are dealing with shows there are others who support you. That's pretty special.
Lime Green has been known to represent the following causes, but is not limited to this list.
Honoring those who have a family member who was/is an organ donor
Cyclin-dependent kinase-like 5 (CDKL5)
Duchenne Muscular Dystrophy
Spinal Cord Injuries (SCI)