Shield is taken into account and is added to health for the calculation,
as the vast majority of damage types are fully blocked by a shield.
3 modes are available:
- Off (default)
- On (Green): Goes through a red-yellow-green-cyan gradient,
closer to vanilla.
- On (White): Goes through a red-yellow-white-green gradient,
closer to games like Xonotic.
When set to either of the On modes, the crosshair color setting
is ignored but the crosshair alpha setting is still used.