Blue - online puzzles

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.

aaaa puzzle online from photoSamudramanthan 2020 online puzzleNeekolul puzzle online from photojapan crosswalk online puzzleSpider Puzzle puzzle online from photoWorkhorse Truck online puzzleClassroom puzzle online from photowerfgthjk puzzle online from photoJigsaw Rush puzzle online from photoBear Chełmieś online puzzleBeautiful alpine landscape puzzle online from photoMulticolor ice cream dripping online puzzleSummer time puzzle online from photoMilford Sound, New Zealand online puzzleBook Game 1 puzzle online from photoWest End Beach, Roatan Island. Honduras puzzle online from photoBeautiful beach of Bequia, St Vincent and the Grenadines online puzzleCaravan car Vacation in Norway online puzzlenature picture online puzzlePastel online puzzleNew Year card puzzle online from photoAnunciação online puzzleMarvel Heroes puzzle online from photoThe Bluest Waters online puzzle
Wall of artists online puzzleChristmas online puzzleDanceparty puzzle online from photoValtra T163 online puzzleexhibition puzzle online from photoFrodo puzzle online from photoAustralian Landmarks online puzzleJapan Winter puzzle online from photoTorre puzzle online from photoVanda online puzzlepargigi puzzle online from photoTOWER PUZZLE puzzle online from photoeiland online puzzleTurtle online puzzlesun beach sea palm tree puzzle online from photopeach rose puzzle online from photoNusa Penida online puzzleLarge container ship online puzzleThailand James Bond stone Island, Phang Nga online puzzlea pier on the lake, a white boat puzzle online from photoAlps in Switzerland puzzle online from photoKvernufoss waterfall in Iceland online puzzleVALENTINE'S DAY puzzle online from photoGLOBAL WARMING puzzle online from photo
Copyright 2024 www.epuzzle.info All rights reserved.