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Blue - online puzzles

84Mugs and cupssolved 4,409 times
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70Tsing Ma Bridge (Hong Kong)solved 4,401 times
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64Erawan Waterfall (Thailand)solved 4,370 times
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60Windmill on the graduation tower (Poland)solved 4,367 times
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40Christ the Redeemer (Brasil)solved 4,312 times
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35Brighton Beach in Melbourne (Australia)solved 4,229 times
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63Young Huskysolved 4,205 times
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54Lonely boatsolved 4,202 times
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35Lamai Beach on the Island of Koh Samui (Thailand)solved 4,188 times
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374Rosettessolved 4,147 times
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60Grassalkovich Palace in Bratislava (Slovakia)solved 4,144 times
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25Watch collage ...solved 4,132 times
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70Cape Reinga Lighthouse (New Zealand)solved 4,107 times
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221Turkish chinasolved 4,094 times
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54Old city Hall in Bamberg (Germany)solved 4,091 times
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60Yellow Labradorsolved 4,087 times
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84Compact Computer 40solved 4,082 times
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35Common Sealsolved 4,076 times
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48Boeing-Stearman Model 75solved 4,064 times
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204Christmas postcard with the beach in the backgroundsolved 4,042 times
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54Cathedral in Segovia (Spain)solved 4,040 times
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63Butterfly - Monarchsolved 4,022 times
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Street in the town of Terena (Portugal) puzzle online from photo
63Street in the town of Terena (Portugal)solved 4,020 times
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Gondolas on the Grand Canal (Italy) puzzle online from photo
54Gondolas on the Grand Canal (Italy)solved 4,020 times
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Colorful leather gloves online puzzle
60Colorful leather glovessolved 3,990 times
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Eiffel Tower (France) puzzle online from photo
46Eiffel Tower (France)solved 3,988 times
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Puppies wearing woolen hats online puzzle
42Puppies wearing woolen hatssolved 3,964 times
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Sand castle online puzzle
40Sand castlesolved 3,945 times
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Pierhead Lighthouse in Milwaukee (USA) online puzzle
35Pierhead Lighthouse in Milwaukee (USA)solved 3,939 times
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Mantua – a town surrounded by lakes (Italy) online puzzle
24Mantua – a town surrounded by lakes (Italy)solved 3,934 times
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View of rocky cliffs in El Nido (Philippines) online puzzle
28View of rocky cliffs in El Nido (Philippines)solved 3,893 times
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Roofs of Nuremberg (Germany) puzzle online from photo
32Roofs of Nuremberg (Germany)solved 3,869 times
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Bouquets of flowers puzzle online from photo
126Bouquets of flowerssolved 3,865 times
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Multicolored roses puzzle online from photo
104Multicolored rosessolved 3,843 times
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Bottle caps puzzle online from photo
280Bottle capssolved 3,837 times
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Islet of Sveti Stefan (Montenegro) online puzzle
48Islet of Sveti Stefan (Montenegro)solved 3,820 times
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Hearts with names online puzzle
252Hearts with namessolved 3,811 times
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Buttons ... puzzle online from photo
112Buttons ...solved 3,792 times
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Bouquet of various flower puzzle online from photo
150Bouquet of various flowersolved 3,766 times
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Qaitbay Fortress (Egypt) puzzle online from photo
63Qaitbay Fortress (Egypt)solved 3,763 times
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Jewelry online puzzle
88Jewelrysolved 3,738 times
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Miami Beach lifeguard tower (USA) online puzzle
306Miami Beach lifeguard tower (USA)solved 3,727 times
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Havasu Canyon (United States) online puzzle
60Havasu Canyon (United States)solved 3,707 times
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Butterfly Idea Ieuconoe puzzle online from photo
70Butterfly Idea Ieuconoesolved 3,671 times
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Licorice allsorts online puzzle
176Licorice allsortssolved 3,669 times
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Deckchairs on Cancun Beach (Mexico) online puzzle
48Deckchairs on Cancun Beach (Mexico)solved 3,668 times
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Eagle Owl puzzle online from photo
25Eagle Owlsolved 3,649 times
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US dollars online puzzle
600US dollarssolved 3,600 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.