Captain Marvel has blue blood because Yon-Rogg gave her a blood transfusion on Hala to bring her back to life. She was alive after absorbing the engine's power which came from the Tesseract, but must have died on the way..
Also to know is, what Colour is Captain Marvel's blood?
blue
Beside above, why did Captain Marvel need a blood transfusion? Therefore, the blood transfusion is part of a bigger effort by the Kree to stabilise Carol Danvers and provide within her a framework in which to utilise the Tesseract's energy. The blood transfusion also grants Carol her superior strength, agility, healing factor, endurance, longevity, etc.
Furthermore, does Captain Marvel have Kree blood?
In the MCU, the alien race known as Kree — seen in the Guardians of the Galaxy movies, and a few episodes of Agents of S.H.I.E.L.D. — actually have blue blood. Marvel (and much later, Captain Marvel). In essence, the Kree bomb turned Carol into a human-Kree hybrid.
Does Carol Danvers have Kree blood?
Although the movie never explains it as fully as in the comics, the end-result is the same: Carol Danvers DNA is no longer Terran nor Kree. It is a unique fusion of both, allowing her to receive a blood transfusion from Yon-Rogg.
Related Question Answers
Why did Carol Danvers have blue blood?
Captain Marvel has blue blood because Yon-Rogg gave her a blood transfusion on Hala to bring her back to life. She was alive after absorbing the engine's power which came from the Tesseract, but must have died on the way.Are all Kree blue?
Kree bodies are adapted to environmental characteristics on Hala that are unlike Earth. The original Kree had blue-colored skin, but a second racial group with pink skin resembling that of human Caucasians emerged over the millennia. The blue-skinned "purebred" Kree have become a small, but powerful, minority.Why are the Kree not blue?
However, they cannot breathe in Earth's atmosphere without using a chemical, "breathing formula", or artificial life-support devices. The original Kree had blue-colored skin, but a second racial group with pink skin resembling that of human Caucasians emerged over the millennia.What color is Carol Danvers blood?
But here's where the big debate lies for the second Captain Marvel trailer: what color is Carol Danvers' blood? Now reworked to be a part-Kree hero, she would ostensibly bleed a bright blue color, but in this shot, and ones shown later, her blood seems to have a greenish blue tint.Why are Kree different colors?
Kree skin, when overexposed to nitrogen, changes from blue to pink, heightening their resemblance to light-skinned humans. Although other races of Kree with natural skin colors other than blue have been shown to exist, such as Korath the Pursuer, Yon-Rogg and Mar-Vell whose skin more closely resembles that of humans.Did Captain Marvel go binary in the movie?
The character has also been known as Binary, Warbird and Captain Marvel at various points in her history. Brie Larson portrays the character in the Marvel Cinematic Universe in the films Captain Marvel (2019) and Avengers: Endgame (2019).What gave Carol Danvers powers?
In a surprise twist, Captain Marvel reveals that, long before Loki got his hands on it, the mighty Tesseract sat in the possession of Kree scientist Mar-Vell, who found a way to channel its energy into a machine known as the Light-Speed Engine. So, Carol Danvers got her powers from the energy of an Infinity Stone.How did Captain Marvel get the Tesseract?
In Captain America: The First Avenger, it is revealed that the Tesseract was brought to Earth by Odin centuries ago. In the film, the Red Skull finds the Tesseract and uses its power to create weapons for Hydra before he is defeated by Captain America and the Tesseract is retrieved by Howard Stark.Do all Kree have Captain Marvel powers?
Some of the Kree are blue-skinned, but others look like humans. Not all the Kree have superpowers, but some do have advanced powers. In general, the Kree are best known for their pugnaciousness and ruthlessness. They're imperialistic and try to force other races (like the Skrulls in this movie) to submit to their rule.Can Captain Marvel fly light speed?
Captain Marvel's origin story movie, also called "Captain Marvel," shows how in the 1990s, Danvers accidentally acquires the ability to travel at very high speeds, close to the speed of light. Danvers and her supervisor are testing an aircraft that uses special technology to travel close to light speed.What are Captain Marvel's powers in the movie?
Brie Larson as Carol Danvers / Vers / Captain Marvel: An ex-U.S. Air Force fighter pilot and member of an elite Kree military unit called Starforce. She was imbued with superhuman strength, energy projection, and flight after exposure to Tesseract energy.Is Captain Marvel Kree or human?
Carol Danvers, a human born on Earth, too became a champion of the Kree. Long story short they altered her genetic structure and she became a hero, enhanced and eventually dubbed the new Captain Marvel.When did Captain Marvel become a woman?
The female superhero first appeared in 1977, and originally named Ms. Marvel as a nod to the iconic feminist magazine, Ms.. She was a minor character but with DeConnick's writing, Captain Marvel was re-developed to become one of the central characters in the Marvel Universe.How is Carol half Kree?
Establishing that Carol is half-Kree by birth means her powers and potential have always been her own. Powers that include flight, super-strength, enhanced speed, increased resilience and the ability to absorb and fire energy blasts. 
