Blood (Earth-2356)

"Blood is about to spill, all right. Yours!"

- Grievous

Blood is a liquid substance present in most sentient beings, though not all species have the same color of blood. Humans, Otoans, San'Shyuum, Sameh and Aqualish, for example, have red blood; while Rodians, Duros, and Trandoshans had green blood. Sangheili have purple blood and Jiralhanae have scarlet blood.

By testing a sample of someone's blood, it is possible to get a midi-chlorian count and determine how sensitive one was to the Force. Human blood was said to have a characteristic metallic taste. Bloodburn is a rare blood disease that affects some starship pilots.

Source

 * https://starwars.fandom.com/wiki/Blood.