Shades of blue

Persian blue (not to be confused with Prussian blue) comes in three major tones: Persian blue proper—a bright medium blue; medium Persian blue (a medium slightly grayish blue that is slightly indigoish); and a kind of dark blue that is much closer to the web color indigo; this darker shade of Persian blue is referred to as Persian indigo, dark Persian blue, or regimental.

Blue is the colour between violet and green on the optical spectrum of visible light.

Cyan (/ˈsaɪ.ən/ or /ˈsaɪ.æn/) is a greenish-blue color.

Ultramarine is a deep blue color and a pigment which was originally made by grinding lapis lazuli into a powder.

Periwinkle is a color in the blue and violet family.

Azure (English pronunciation: /ˈæʒər/ AZH-ər) is a variation of blue that is often described as the color of the sky on a clear summer's day.

Electric blue is a color whose definition varies but is often considered close to cyan and that is a representation of the color of lightning, an electric spark, and the color of ionized argon gas; it was originally named after the ionized air glow produced during electrical discharges, though its meaning has broadened to include shades of blue that are metaphorically "electric" by virtue of being "intense" or particularly "vibrant".

Royal blue describes both a bright shade and a dark shade of azure blue.

Glaucous (from the Latin glaucus, meaning "bluish-grey or green", from the Greek glaukós) is used to describe the pale grey or bluish-green appearance of the surfaces of some plants, as well as in the names of birds, such as the glaucous gull (Larus hyperboreus), glaucous-winged gull (Larus glaucescens), glaucous macaw (Anodorhynchus glaucus), and glaucous tanager (Thraupis glaucocolpa).

Turquoise /ˈtɜːrkɔɪz/ or /ˈtɜːrkwɔɪz/ is the name of a greenish-blue color, based on the gem of the same name.

Indigo is a color that is traditionally regarded as a color in the visible spectrum, as well as one of the seven colors of the rainbow: the color between blue and violet.

Egyptian blue, also known as calcium copper silicate (CaCuSi4O10 or CaOCuO(SiO2)4) or cuprorivaite, is a pigment used in ancient Egypt for thousands of years.

Powder blue may refer to two different colors.

True Blue is a tone of blue deeper than powder blue and lighter than royal blue that was developed by the UCLA Athletic Department and Adidas to be the color for all of UCLA's athletic teams starting in the 2003–2004 school year.

Tufts Blue is the tone of azure blue used in association with Tufts University.

UCLA Blue is the dark azure color used in association with the University of California, Los Angeles (UCLA).

Maya blue (Spanish: azul maya) is a unique bright azure blue pigment manufactured by cultures of pre-Columbian Mesoamerica, such as the Maya and Aztec.

Steel blue is a shade of blue that resembles blue steel, i.

Oxford Blue is the official colour of the University of Oxford.

Blue-gray (American English); blue-grey (English) is a medium bluish-gray color.

Eton blue is a Greenish-blue colour used since early 19th century by sportsmen of Eton College.

Blue-green is a color that is a representation of the color that is between blue and green on a typical traditional old-fashioned RYB color wheel.

Varieties of the color blue may differ in hue, chroma (also called saturation, intensity, or colorfulness), or lightness (or value, tone, or brightness), or in two or three of these qualities.

Yale Blue is the dark azure color used in association with Yale University.

Air Force blue colours are a variety of colours that are mostly various tones of the colour azure, the purest tones of which are identified as being the colour of the sky on a clear day.

Marian blue is a tone of the color celeste named for its use with the Virgin Mary.

Phthalocyanine Blue BN, also called Monastral blue, phthalo blue, thalo blue (and others) (CAS 147-14-8, EINECS 205-685-1), is a bright, crystalline, synthetic blue pigment from the group of phthalocyanine dyes.

Teal is a medium-saturated, blue-green color, similar to medium green and dark cyan.

Capri is the colour of the sky.

Bleu de France (Blue of France) is a colour traditionally used to represent France.

Baby blue is a pale tint of azure, one of the pastel colors.

Sapphire is a saturated shade of blue, referring to the gem of the same name.

Cornflower blue is a shade of medium-to-light blue containing relatively little green compared to blue.

Alice blue is a pale tint of azure that was favored by Alice Roosevelt Longworth, daughter of Theodore Roosevelt, which sparked a fashion sensation in the United States.

Zaffre, a pre-scientific substance (see List of alchemical substances), is a deep blue pigment obtained by roasting cobalt ore, and is made of either an impure form of cobalt oxide or impure cobalt arseniate.

Midnight blue is a dark shade of blue named for its resemblance to the identifiably blue color of a moonlit night sky on or near the night of a full moon.

Tiffany Blue is the colloquial name for the light medium robin egg blue color associated with Tiffany & Co.

Non-photo blue (or non-repro blue) is a common tool used in the graphic design and print industry.

Dodger blue is a rich bright tone of the color azure named for its use in the uniform of the Los Angeles Dodgers.

Cerulean (/səˈruːliən/), also spelled caerulean, is a color term that may be applied to certain colors with the hue ranging roughly between blue and cyan, overlapping with both.

Prussian blue is a dark blue pigment with the idealized chemical formula Fe7(CN)18.

Cobalt blue is a blue pigment made by sintering cobalt(II) oxide with alumina at 1200 °C.

Columbia blue, also known as Jordy blue, is a light blue tertiary color named after Columbia University.

Duke blue is a dark blue tertiary color, associated with Duke University.

Cambridge Blue is the colour commonly used by sports teams from Cambridge University.

Carolina blue (occasionally referred to as Tar Heel blue) is the shade of blue used as one of the official school colors of the University of North Carolina.

Navy blue is a very dark shade of the color blue.