Question: Does the Landseer or English Mastiff have a limited range of colors? 

Context paragraphs:
Molossus of Epirus: The Molossus of Epirus (Greek: Μολοσσός της Ηπείρου) is a large dog breed originating from Greece.  It is a livestock guardian that has been bred since the age of Alexander the Great for protecting livestock from carnivorous mammals including the wolf, European jackal and the brown bear in the mountainous regions of Greece, especially Epirus.  The Molossus is a pure Greek breed and is believed to be one of the main ancestors of today's Molosser breeds, such as the English Mastiff and the Neapolitan Mastiff,

George Landseer: George Landseer, was an English painter born 1829 and died in London 1878; he was the nephew of Sir Edwin Henry Landseer and his father Thomas Landseer was also an artist.  He studied at the R.A. schools in 1846 and exhibited at the Royal Academy from 1850 until 1858 before establishing a practice in India painting landscapes and portraits in oil and watercolour.  He returned to England in about 1870 and gave up painting due to poor health.

Tonal Impressionism: Tonal Impressionism is an art historical term that refers to works of art that are "mood" paintings with simplified compositions, done in a limited range of colors, as with Tonalist works, but using the brighter, more chromatic palette of Impressionism.  The term or title also refers to an exhibition titled "Tonal Impressionism" which was curated by the art historian Harry Muir Kurtzworth for the Los Angeles Art Association Gallery at the Los Angeles Central Library in June 1937 with the works of a number of prominent California artists.  In recent years, the term has also been used to describe a non-linear approach to painting where the subject is massed in with tonal values without the use of underdrawing.

Bullmastiff: The Bullmastiff is a large-sized breed of domestic dog, with a solid build and a short muzzle.  The Bullmastiff shares the characteristics of molosser dogs, and was originally developed by 19th-century gamekeepers to guard estates.  The breed's bloodlines are drawn from the English Mastiff and the extinct Old English Bulldog.  It was recognized as a purebred dog by the English Kennel Club in 1924.  They are quiet dogs and very rarely bark.

Landseer (dog): The "'Landseer" is a dog breed.  The breed is not recognized by all kennel clubs .  It is not to be confused with a white and black Newfoundland, which is also often called a "landseer".

Suprematism: Suprematism (Russian: "Супремати́зм" ) is an art movement, focused on basic geometric forms, such as circles, squares, lines, and rectangles, painted in a limited range of colors.  It was founded by Kazimir Malevich in Russia, around 1913, and announced in Malevich's 1915 exhibition, The Last Futurist Exhibition of Paintings 0.10, in St. Petersburg, where he, alongside 13 other artists, exhibited 36 works in a similar style.  The term "suprematism" refers to an abstract art based upon "the supremacy of pure artistic feeling" rather than on visual depiction of objects.

Bipack color: In bipack color photography for motion pictures, two strips of black-and-white 35 mm film, running through the camera emulsion to emulsion, are used to record two regions of the color spectrum, for the purpose of ultimately printing the images, in complementary colors, superimposed on one strip of film.  The result is a multicolored projection print that reproduces a useful but limited range of color by the subtractive color method.  Bipack processes became commercially practical in the early 1910s when Kodak introduced duplitized film print stock, which facilitated making two-color prints.

Lasthenia conjugens: Lasthenia conjugens, commonly known as Contra Costa goldfields, is an endangered species of wildflower endemic to a limited range within the San Francisco Bay Area of the state of California, USA.  Specifically this rare species occurs in Napa, Santa Barbara, Solano, Contra Costa, Santa Clara, Monterey and Alameda Counties.  This annual herb typically flowers from March through June, and its colonies grow in vernal pool habitats at elevations not exceeding 100 meters above sea level.  "The Jepson Manual" notes that the present distribution is limited to the deltaic Sacramento Valley, principally Napa and Solano Counties, but the historic range of "L. conjugens" is known to be significantly wider.  In any case, historically the range has included parts of the North Coast, Sacramento Valley, and San Francisco Bay Area as well as the South Coast.  Alternatively and less frequently this taxon has been referred to as Baeria fremontii var.  conjugens.

Zorba (dog): Aicama Zorba of La-Susa or Zorba (26 September 1981 - Unknown ) was a male Old English Mastiff who was recognized by Guinness World Records as the heaviest and longest dog in the world.

English Mastiff: The English Mastiff is a breed of extremely large dog (often known simply as the Mastiff) perhaps descended from the ancient Alaunt and Pugnaces Britanniae, with a significant input from the Alpine Mastiff in the 19th century.  Distinguishable by enormous size, massive head, and a limited range of colours, but always displaying a black mask, the Mastiff is noted for its gentle and loving nature.  The lineage of modern dogs can be traced back to the early 19th century, but the modern type was stabilised in the 1880s and refined since.  Following a period of sharp decline, the Mastiff has increased its worldwide popularity.  Throughout its history, the Mastiff has contributed to the development of a number of dog breeds, some generally known as Mastiff-type dogs, or, confusingly, just as "Mastiffs".

Supporting paragraphs: Landseer (dog) English Mastiff
Answer: English Mastiff