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Blue - online puzzles

112Atari 65XEsolved 3,576 times
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48Town of Atrani on the Amalfi Coast (Italy)solved 3,565 times
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48Damaged docksolved 3,522 times
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77Towers of cathedral in Munich (Germany)solved 3,496 times
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54Lifeguard tower in Miami Beach (USA)solved 3,490 times
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64Flaming Gore National Recreation Area (USA)solved 3,474 times
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45Easter Bunnysolved 3,454 times
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48Monorail station in Sentosa (Singapore)solved 3,447 times
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56Ermoupoli on the island of Siros (Greece)solved 3,446 times
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50Sunset on Santorini (Greece)solved 3,431 times
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48Project TBF-723solved 3,428 times
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63Daffodilssolved 3,420 times
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35Fishing Boatsolved 3,391 times
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24Lovely kittensolved 3,357 times
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35Beach on the island of Boracay (Philippines)solved 3,344 times
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54Canal in the center of Bruges (Belgium)solved 3,338 times
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70Small Tortoiseshellsolved 3,335 times
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70Macawsolved 3,334 times
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Clocks and watches puzzle online from photo
81Clocks and watchessolved 3,312 times
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Fruits puzzle online from photo
70Fruitssolved 3,309 times
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Lilla Dan ship off the coast of Copenhagen (Denmark) online puzzle
35Lilla Dan ship off the coast of Copenhagen (Denmark)solved 3,289 times
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Facades of colorful house in Burano (Italy) puzzle online from photo
88Facades of colorful house in Burano (Italy)solved 3,284 times
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Statue of Tsar Alexander II on the Senate Square (Finland) puzzle online from photo
24Statue of Tsar Alexander II on the Senate Square (Finland)solved 3,241 times
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Sunrise over the moraine Lake (Canada) online puzzle
80Sunrise over the moraine Lake (Canada)solved 3,231 times
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cosmos puzzle online from photo
15cosmossolved 3,223 times
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Hippopotamus online puzzle
54Hippopotamussolved 3,212 times
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Orangutan online puzzle
48Orangutansolved 3,194 times
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Balloons online puzzle
105Balloonssolved 3,183 times
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Lake Tahoe (USA) online puzzle
96Lake Tahoe (USA)solved 3,171 times
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Flowers online puzzle
48Flowerssolved 3,158 times
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Lilla Dan sailing ship at Christiansø (Denmark) online puzzle
40Lilla Dan sailing ship at Christiansø (Denmark)solved 3,150 times
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Karácsonyi Puzzle puzzle online from photo
16Karácsonyi Puzzlesolved 3,132 times
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Giugiaro Ford Mustang Concept online puzzle
35Giugiaro Ford Mustang Conceptsolved 3,105 times
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Christ the King (Poland) puzzle online from photo
54Christ the King (Poland)solved 3,095 times
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Phi-Phi Islands (Thailand) puzzle online from photo
60Phi-Phi Islands (Thailand)solved 3,091 times
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A dog during a cruise puzzle online from photo
25A dog during a cruisesolved 3,088 times
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Turning Torso (Sweden) online puzzle
39Turning Torso (Sweden)solved 3,079 times
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El Caletón natural pools in Garachico (Spain) puzzle online from photo
40El Caletón natural pools in Garachico (Spain)solved 3,078 times
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Christmas balls puzzle online from photo
35Christmas ballssolved 3,076 times
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Wooden palace in Kolomenskoye (Russia) puzzle online from photo
72Wooden palace in Kolomenskoye (Russia)solved 3,029 times
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Retro car online puzzle
45Retro carsolved 3,028 times
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Boats at the quay in Stockholm (Sweden) puzzle online from photo
35Boats at the quay in Stockholm (Sweden)solved 3,014 times
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Engine puzzle online from photo
192Enginesolved 3,000 times
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Oslo (Norway) online puzzle
70Oslo (Norway)solved 2,999 times
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Pueblo on the hillside (Spain) online puzzle
77Pueblo on the hillside (Spain)solved 2,998 times
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Cetatuia Monastery in Iassy (Romania) online puzzle
48Cetatuia Monastery in Iassy (Romania)solved 2,998 times
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Street lamp puzzle online from photo
32Street lampsolved 2,991 times
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Gerlach Peak (Slovakia) puzzle online from photo
35Gerlach Peak (Slovakia)solved 2,988 times
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Online puzzle Blue

Blue

Blue is one of the three primary colours in the RYB colour model (traditional colour theory), as well as in the RGB (additive) colour model. It lies between violet and cyan on the spectrum of visible light. The eye perceives blue when observing light with a dominant wavelength between approximately 450 and 495 nanometres. Most blues contain a slight mixture of other colours; azure contains some green, while ultramarine contains some violet. The clear daytime sky and the deep sea appear blue because of an optical effect known as Rayleigh scattering. An optical effect called the Tyndall effect explains blue eyes. Distant objects appear more blue because of another optical effect called aerial perspective.

Blue has been an important colour in art and decoration since ancient times. The semi-precious stone lapis lazuli was used in ancient Egypt for jewellery and ornament and later, in the Renaissance, to make the pigment ultramarine, the most expensive of all pigments. In the eighth century Chinese artists used cobalt blue to colour fine blue and white porcelain. In the Middle Ages, European artists used it in the windows of cathedrals. Europeans wore clothing coloured with the vegetable dye woad until it was replaced by the finer indigo from America. In the 19th century, synthetic blue dyes and pigments gradually replaced organic dyes and mineral pigments. Dark blue became a common colour for military uniforms and later, in the late 20th century, for business suits. Because blue has commonly been associated with harmony, it was chosen as the colour of the flags of the United Nations and the European Union.In the United States and Europe, blue is the colour that both men and women are most likely to choose as their favourite, with at least one recent survey showing the same across several other countries, including China, Malaysia, and Indonesia. Past surveys in the US and Europe have found that blue is the colour most commonly associated with harmony, confidence, masculinity, knowledge, intelligence, calm, distance, infinity, the imagination, cold, and sadness.