Question: What red color sworn gang is one of the rivals of the NLR?

Context paragraphs:
Hypochromic anemia: Hypochromic anemia is a generic term for any type of anemia in which the red blood cells (erythrocytes) are paler than normal.  ("Hypo"- refers to "less", and "chromic" means "color".)  A normal red blood cell will have an area of pallor in the center of it; it is biconcave disk shaped.  In hypochromic cells, this area of central pallor is increased.  This decrease in redness is due to a disproportionate reduction of red cell hemoglobin (the pigment that imparts the red color) in proportion to the volume of the cell.  Clinically the color can be evaluated by the Mean Corpuscular Hemoglobin (MCH) or Mean Corpuscular Hemoglobin Concentration (MCHC).  The MCHC is considered the better parameter of the two as it adjusts for effect the size of the cell has on its color.  Hypochromia is clinically defined as below the normal MHC reference range of 27-33 picograms/cell in adults or below the normal MCHC reference range of 33-36 g/dL in adults.

Nazi Lowriders: The Nazi Lowriders (or NLR, or The Ride) are an organized crime syndicate, and peckerwood prison and street gang based primarily in Southern California and Texas.  They also have small factions in rural and suburban Chicago, and are believed to have spread to many other states.  They are allies of the larger and more notorious gangs, the Aryan Brotherhood and the Mexican Mafia and fellow peckerwood gang Public Enemy No. 1.  Their main rivals are the Bloods, the Crips, the Black Guerrilla Family, MS-13, Nortenos, and Nuestra Familia.  The Nazi Low Riders operate in and outside prison walls.  They are often fueled by their drug of choice, methamphetamine.  NLR violence has struck the general public, including police officers.

Blood red: The color blood red is a dark shade of the color red meant to resemble the color of human blood (which is composed of oxygenated red erythrocytes, white leukocytes, and yellow blood plasma).  It is the iron in hemoglobin specifically that gives blood its red color.  The actual color ranges from crimson to a dark brown-red depending on how oxygenated the blood is, and may have a slightly orange hue.  Deoxygenated blood, which circulates closer to the body's surface and which is therefore generally more likely to be seen than oxygenated blood, issues from bodily veins in a dark red state, but quickly oxygenates upon exposure to air, turning a brighter shade of red.  This happens more quickly with smaller volumes of blood such as a pinprick and less quickly from cuts or punctures that cause greater blood flows such as a puncture in the basilic vein: all blood collected during a phlebotomy procedure is deoxygenated blood, and it does not usually have a chance to become oxygenated upon leaving the body.  Arterial blood, which is already oxygenated, is also already a brighter shade of red— this is the blood see from a pulsating neck, arm, or leg wound, and it does not change color upon exposure to air.  The color "blood red", therefore, covers both these states: the darker deoxygenated color and the brighter oxygenated one.  Also, dried blood often has a darker, rust-colored quality: all dried blood has been oxygenated and then desiccated, causing the cells within it to die.  This blood is often darker than either shade of red that can be seen in fresh blood.

Dermatophyte test medium: Dermatophyte test medium (DTM) is a specialized agar used in medical mycology.  It is based on Sabouraud's dextrose agar with added cycloheximide to inhibit saprotrophic growth, antibiotic to inhibit bacterial growth, and phenol red a pH indicator.  The pH indicator is useful in distinguishing a dermatophyte fungus, which utilizes nitrogenous material for preferred metabolism, producing alkaline by-products, imparting a red color change to the medium.  Typical saprotrophic fungi utilize carbohydrates in the medium producing acidic by-products and no red color change.

Amaranth (dye): Amaranth, FD&C Red No. 2, E123, C.I. Food Red 9, Acid Red 27, Azorubin S, or C.I. 16185 is a dark red to purple azo dye used as a food dye and to color cosmetics.  The name was taken from amaranth grain, a plant distinguished by its red color and edible protein-rich seeds.

Red beds: Red beds (or redbeds) are sedimentary rocks, which typically consist of sandstone, siltstone, and shale that are predominantly red in color due to the presence of ferric oxides. Frequently, these red-colored sedimentary strata locally contain thin beds of conglomerate, marl, limestone, or some combination of these sedimentary rocks.  The ferric oxides, which are responsible for the red color of red beds, typically occur as a coating on the grains of sediments comprising red beds.  Classic examples of red beds are the Permian and Triassic strata of the western United States and the Devonian Old Red Sandstone facies of Europe.

Red diamonds: Red diamond is a diamond which displays red color throughout its prism, and exhibits all the same mineral properties as colorless diamonds.  Red diamonds are commonly known as the most expensive and the rarest diamond color in the world, even more so than pink diamonds or blue diamonds.  Red diamonds, just like pink diamonds are greatly debated as to the source of their color, but the gemological community most commonly attributes both colors to gliding atoms in the diamond’s structure as it undergoes enormous pressure during its formation.

Red wine: Red wine is a type of wine made from dark-colored (black) grape varieties.  The actual color of the wine can range from intense violet, typical of young wines, through to brick red for mature wines and brown for older red wines.  The juice from most purple grapes is greenish-white; the red color comes from anthocyan pigments (also called anthocyanins) present in the skin of the grape; exceptions are the relatively uncommon teinturier varieties, which produce a red colored.  Much of the red-wine production process therefore involves extraction of color and flavor components from the grape skin.

Union Philosophical Society: The Union Philosophical Society or UPS is the seventh-oldest collegiate organization in the United States, and one of the three oldest literary societies.  Founded at Dickinson College in 1789, it took the white rose and the Roman goddess Minerva as its primary symbols.  The Union Philosophical Society adopted a badge in 1791, designed as a Maltese Cross with a wreath of white roses about the letters 'U.P.S.'.  The white rose of this society is responsible for the white color adopted as one of the honorary colors of Dickinson College (the red rose of the Belles Lettres Society is responsible for the red color adopted as the other honorary color of Dickinson College).  This was in opposition to Belles Lettres, the sixth oldest collegiate organization in the US, and founded three years before UPS.  Throughout the college's history and only discontinued in the mid-20th century, Dickinson students had to join either Belles Lettres or Union Philosophical Society to participate in other extracurricular collegiate activities.  Belles Lettres and UPS developed a rivalry that continues to this day.

Bloods: The Bloods also known as (OBF) Original Blood Family are a primarily, though not exclusively, African American street gang founded in Los Angeles, California.  The gang is widely known for its rivalry with the Crips.  They are identified by the red color worn by their members and by particular gang symbols, including distinctive hand signs.

Supporting paragraphs: Nazi Lowriders Bloods
Answer: Bloods